added status validation
diff --git a/buying/doctype/purchase_order/purchase_order.py b/buying/doctype/purchase_order/purchase_order.py
index 85a11ed..f589b67 100644
--- a/buying/doctype/purchase_order/purchase_order.py
+++ b/buying/doctype/purchase_order/purchase_order.py
@@ -128,9 +128,14 @@
 	# Validate
 	def validate(self):
 		self.validate_fiscal_year()
-		# Step 1:=> set status as "Draft"
-		webnotes.conn.set(self.doc, 'status', 'Draft')
-		
+
+		if not self.doc.status:
+			self.doc.status = "Draft"
+
+		import utilities
+		utilities.validate_status(self.doc.status, ["Draft", "Submitted", "Stopped", 
+			"Cancelled"])
+
 		# Step 2:=> get Purchase Common Obj
 		pc_obj = get_obj(dt='Purchase Common')
 		
diff --git a/buying/doctype/purchase_request/purchase_request.py b/buying/doctype/purchase_request/purchase_request.py
index 3f7f932..0a7ae19 100644
--- a/buying/doctype/purchase_request/purchase_request.py
+++ b/buying/doctype/purchase_request/purchase_request.py
@@ -141,8 +141,12 @@
 		self.validate_schedule_date()
 		self.validate_fiscal_year()
 		
-		# set status as "Draft"
-		webnotes.conn.set(self.doc, 'status', 'Draft')
+		if not self.doc.status:
+			self.doc.status = "Draft"
+
+		import utilities
+		utilities.validate_status(self.doc.status, ["Draft", "Submitted", "Stopped", 
+			"Cancelled"])
 
 		# Get Purchase Common Obj
 		pc_obj = get_obj(dt='Purchase Common')
diff --git a/buying/doctype/supplier_quotation/supplier_quotation.py b/buying/doctype/supplier_quotation/supplier_quotation.py
index cac4bab..9e62e13 100644
--- a/buying/doctype/supplier_quotation/supplier_quotation.py
+++ b/buying/doctype/supplier_quotation/supplier_quotation.py
@@ -30,10 +30,16 @@
 		self.doc.name = make_autoname(self.doc.naming_series + ".#####")
 		
 	def validate(self):
+		if not self.doc.status:
+			self.doc.status = "Draft"
+
+		import utilities
+		utilities.validate_status(self.doc.status, ["Draft", "Submitted", "Stopped", 
+			"Cancelled"])
+		
 		self.validate_fiscal_year()
 		self.validate_common()
 		self.set_in_words()
-		self.doc.status = "Draft"
 
 	def on_submit(self):
 		purchase_controller = webnotes.get_obj("Purchase Common")
diff --git a/hr/doctype/appraisal/appraisal.py b/hr/doctype/appraisal/appraisal.py
index b4b0e4e..82fb77b 100644
--- a/hr/doctype/appraisal/appraisal.py
+++ b/hr/doctype/appraisal/appraisal.py
@@ -57,6 +57,7 @@
 	def validate(self):
 		if not self.doc.status:
 			self.doc.status = "Draft"
+
 		self.validate_dates()
 		self.validate_existing_appraisal()
 		self.calculate_total()
diff --git a/hr/doctype/attendance/attendance.py b/hr/doctype/attendance/attendance.py
index d3daeb1..d1ebc97 100644
--- a/hr/doctype/attendance/attendance.py
+++ b/hr/doctype/attendance/attendance.py
@@ -8,11 +8,11 @@
 # 
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 # GNU General Public License for more details.
 # 
 # You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
 
 from __future__ import unicode_literals
 import webnotes
@@ -28,79 +28,81 @@
 
 
 class DocType:
-  def __init__(self, doc, doclist=[]):
-    self.doc = doc
-    self.doclist = doclist
-    
-  #autoname function
-  def autoname(self):
-    self.doc.name = make_autoname(self.doc.naming_series+'.#####')
-  
-  #get employee name based on employee id selected 
-  def get_emp_name(self):
-    emp_nm = sql("select employee_name from `tabEmployee` where name=%s", self.doc.employee)
+	def __init__(self, doc, doclist=[]):
+		self.doc = doc
+		self.doclist = doclist
+		
+	#autoname function
+	def autoname(self):
+		self.doc.name = make_autoname(self.doc.naming_series+'.#####')
+	
+	#get employee name based on employee id selected 
+	def get_emp_name(self):
+		emp_nm = sql("select employee_name from `tabEmployee` where name=%s", self.doc.employee)
 
-    #this is done because sometimes user entered wrong employee name while uploading employee attendance
-    webnotes.conn.set(self.doc, 'employee_name', emp_nm and emp_nm[0][0] or '')
+		#this is done because sometimes user entered wrong employee name while uploading employee attendance
+		webnotes.conn.set(self.doc, 'employee_name', emp_nm and emp_nm[0][0] or '')
 
-    ret = { 'employee_name' : emp_nm and emp_nm[0][0] or ''}
-    return ret
-  
-  #validation for duplicate record
-  def validate_duplicate_record(self):   
-    res = sql("select name from `tabAttendance` where employee = '%s' and att_date = '%s' and not name = '%s' and docstatus = 1"%(self.doc.employee,self.doc.att_date, self.doc.name))
-    if res:
-      msgprint("Employee's attendance already marked.")
-      raise Exception
-      
-  
-  #check for already record present in leave transaction for same date
-  def check_leave_record(self):
-    if self.doc.status == 'Present':
-      chk = sql("select name from `tabLeave Application` where employee=%s and (from_date <= %s and to_date >= %s) and docstatus!=2", (self.doc.employee, self.doc.att_date, self.doc.att_date))
-      if chk:
-        msgprint("Leave Application created for employee "+self.doc.employee+" whom you are trying to mark as 'Present' ")
-        raise Exception
-  
-         
-  def validate_fiscal_year(self):
-    fy=sql("select year_start_date from `tabFiscal Year` where name='%s'"% self.doc.fiscal_year)
-    ysd=fy and fy[0][0] or ""
-    yed=add_days(str(ysd),365)
-    if str(self.doc.att_date) < str(ysd) or str(self.doc.att_date) > str(yed):
-      msgprint("'%s' Not Within The Fiscal Year selected"%(self.doc.att_date))
-      raise Exception
-  
-  def validate_att_date(self):
-    import datetime
-    if getdate(self.doc.att_date)>getdate(datetime.datetime.now().date().strftime('%Y-%m-%d')):
-      msgprint("Attendance can not be marked for future dates")
-      raise Exception
+		ret = { 'employee_name' : emp_nm and emp_nm[0][0] or ''}
+		return ret
+	
+	#validation for duplicate record
+	def validate_duplicate_record(self):	 
+		res = sql("select name from `tabAttendance` where employee = '%s' and att_date = '%s' and not name = '%s' and docstatus = 1"%(self.doc.employee,self.doc.att_date, self.doc.name))
+		if res:
+			msgprint("Employee's attendance already marked.")
+			raise Exception
+			
+	
+	#check for already record present in leave transaction for same date
+	def check_leave_record(self):
+		if self.doc.status == 'Present':
+			chk = sql("select name from `tabLeave Application` where employee=%s and (from_date <= %s and to_date >= %s) and docstatus!=2", (self.doc.employee, self.doc.att_date, self.doc.att_date))
+			if chk:
+				msgprint("Leave Application created for employee "+self.doc.employee+" whom you are trying to mark as 'Present' ")
+				raise Exception
+	
+				 
+	def validate_fiscal_year(self):
+		fy=sql("select year_start_date from `tabFiscal Year` where name='%s'" % \
+			self.doc.fiscal_year)
+		ysd=fy and fy[0][0] or ""
+		yed=add_days(str(ysd),365)
+		if str(self.doc.att_date) < str(ysd) or str(self.doc.att_date) > str(yed):
+			msgprint("'%s' Not Within The Fiscal Year selected"%(self.doc.att_date))
+			raise Exception
+	
+	def validate_att_date(self):
+		import datetime
+		if getdate(self.doc.att_date)>getdate(datetime.datetime.now().date().strftime('%Y-%m-%d')):
+			msgprint("Attendance can not be marked for future dates")
+			raise Exception
 
-  # Validate employee
-  #-------------------
-  def validate_employee(self):
-    emp = sql("select name, status from `tabEmployee` where name = '%s'" % self.doc.employee)
-    if not emp:
-      msgprint("Employee: %s does not exists in the system" % self.doc.employee, raise_exception=1)
-    elif emp[0][1] != 'Active':
-      msgprint("Employee: %s is not Active" % self.doc.employee, raise_exception=1)
-      
-  # validate...
-  def validate(self):
-    self.validate_fiscal_year()
-    self.validate_att_date()
-    self.validate_duplicate_record()
-    #self.validate_status()
-    self.check_leave_record()
-    
-  def on_update(self):
-    #self.validate()
-    
-    #this is done because sometimes user entered wrong employee name while uploading employee attendance
-    x=self.get_emp_name()
+	# Validate employee
+	#-------------------
+	def validate_employee(self):
+		emp = sql("select name, status from `tabEmployee` where name = '%s'" % self.doc.employee)
+		if not emp:
+			msgprint("Employee: %s does not exists in the system" % self.doc.employee, raise_exception=1)
+		elif emp[0][1] != 'Active':
+			msgprint("Employee: %s is not Active" % self.doc.employee, raise_exception=1)
+			
+	def validate(self):
+		import utilities
+		utilities.validate_status(self.doc.status, ["Present", "Absent", "Half Day"])
 
-  def on_submit(self):
-    #this is done because while uploading attendance chnage docstatus to 1 i.e. submit
-    webnotes.conn.set(self.doc,'docstatus',1)
-    pass
+		self.validate_fiscal_year()
+		self.validate_att_date()
+		self.validate_duplicate_record()
+		self.check_leave_record()
+		
+	def on_update(self):
+		#self.validate()
+		
+		#this is done because sometimes user entered wrong employee name while uploading employee attendance
+		x=self.get_emp_name()
+
+	def on_submit(self):
+		#this is done because while uploading attendance chnage docstatus to 1 i.e. submit
+		webnotes.conn.set(self.doc,'docstatus',1)
+		pass
diff --git a/hr/doctype/employee/employee.py b/hr/doctype/employee/employee.py
index c0f7be3..ab3f842 100644
--- a/hr/doctype/employee/employee.py
+++ b/hr/doctype/employee/employee.py
@@ -19,7 +19,7 @@
 
 from webnotes.utils import getdate, validate_email_add
 from webnotes.model.doc import make_autoname
-from webnotes import msgprint
+from webnotes import msgprint, _
 
 sql = webnotes.conn.sql
 
@@ -39,6 +39,16 @@
 				self.doc.name = make_autoname(self.doc.employee_number)
 
 		self.doc.employee = self.doc.name
+
+	def validate(self):
+		import utilities
+		utilities.validate_status(self.doc.status, ["Active", "Left"])
+
+		self.doc.employee = self.doc.name
+		self.validate_date()
+		self.validate_email()
+		self.validate_name()
+		self.validate_status()
 				
 	def get_retirement_date(self):		
 		import datetime
@@ -52,13 +62,6 @@
 		ret_sal_struct=sql("select name from `tabSalary Structure` where employee='%s' and is_active = 'Yes' and docstatus!= 2"%nm)
 		return ret_sal_struct and ret_sal_struct[0][0] or ''
 
-	def validate(self):
-		self.doc.employee = self.doc.name
-		self.validate_date()
-		self.validate_email()
-		self.validate_name()
-		self.validate_status()
-	
 	def on_update(self):
 		self.update_user_default()
 	
diff --git a/hr/doctype/expense_claim/expense_claim.py b/hr/doctype/expense_claim/expense_claim.py
index b3a132e..2ba53aa 100644
--- a/hr/doctype/expense_claim/expense_claim.py
+++ b/hr/doctype/expense_claim/expense_claim.py
@@ -33,9 +33,8 @@
 		# if self.doc.exp_approver == self.doc.owner:
 		# 	webnotes.msgprint("""Self Approval is not allowed.""", raise_exception=1)
 
-		if self.doc.status not in ("Draft", "Approved", "Rejected"):
-			webnotes.msgprint("Status must be one of 'Draft', 'Approved' or 'Rejected'", 
-				raise_exception=True)
+		import utilities
+		utilities.validate_status(self.doc.status, ["Draft", "Approved", "Rejected"])
 
 		self.validate_fiscal_year()
 		self.validate_exp_details()
diff --git a/hr/doctype/leave_application/leave_application.py b/hr/doctype/leave_application/leave_application.py
index e61f7b5..ebefc0e 100755
--- a/hr/doctype/leave_application/leave_application.py
+++ b/hr/doctype/leave_application/leave_application.py
@@ -33,9 +33,8 @@
 	def validate(self):
 		# if self.doc.leave_approver == self.doc.owner:
 		# 	webnotes.msgprint("""Self Approval is not allowed.""", raise_exception=1)
-		if self.doc.status not in ("Open", "Approved", "Rejected"):
-			webnotes.msgprint("Status must be one of 'Open', 'Approved' or 'Rejected'", 
-				raise_exception=True)
+		import utilities
+		utilities.validate_status(self.doc.status, ["Open", "Approved", "Rejected"])
 
 		self.validate_to_date()
 		self.validate_balance_leaves()
diff --git a/hr/doctype/salary_structure/salary_structure.py b/hr/doctype/salary_structure/salary_structure.py
index f310b7b..9c5ad24 100644
--- a/hr/doctype/salary_structure/salary_structure.py
+++ b/hr/doctype/salary_structure/salary_structure.py
@@ -8,11 +8,11 @@
 # 
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the
 # GNU General Public License for more details.
 # 
 # You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# along with this program.	If not, see <http://www.gnu.org/licenses/>.
 
 from __future__ import unicode_literals
 import webnotes
@@ -28,87 +28,86 @@
 
 
 class DocType:
-  #init function
-  def __init__(self,doc,doclist=[]):
-    self.doc = doc
-    self.doclist = doclist
+	#init function
+	def __init__(self,doc,doclist=[]):
+		self.doc = doc
+		self.doclist = doclist
  
-  #autoname function
-  #---------------------------------------------------------
-  def autoname(self):
-    self.doc.name = make_autoname(self.doc.employee + '/.SST' + '/.#####')
-  
-  #get employee details
-  #---------------------------------------------------------
-  def get_employee_details(self):
-    ret = {}
-    det = sql("select employee_name, branch, designation, department, grade from `tabEmployee` where name = '%s'" %self.doc.employee)
-    if det:
-      ret = {
-        'employee_name'  : cstr(det[0][0]),
-        'branch'         : cstr(det[0][1]),
-        'designation'    : cstr(det[0][2]),
-        'department'     : cstr(det[0][3]),
-        'grade'          : cstr(det[0][4]),
-        'backup_employee': cstr(self.doc.employee)
-      }
-    return ret
-    
+	#autoname function
+	#---------------------------------------------------------
+	def autoname(self):
+		self.doc.name = make_autoname(self.doc.employee + '/.SST' + '/.#####')
+	
+	#get employee details
+	#---------------------------------------------------------
+	def get_employee_details(self):
+		ret = {}
+		det = sql("select employee_name, branch, designation, department, grade from `tabEmployee` where name = '%s'" %self.doc.employee)
+		if det:
+			ret = {
+				'employee_name': cstr(det[0][0]),
+				'branch': cstr(det[0][1]),
+				'designation': cstr(det[0][2]),
+				'department': cstr(det[0][3]),
+				'grade': cstr(det[0][4]),
+				'backup_employee': cstr(self.doc.employee)
+			}
+		return ret
+		
 
-  # Set Salary structure field values
-  #---------------------------------------------------------
-  def get_ss_values(self,employee):
-    basic_info = sql("select bank_name, bank_ac_no, esic_card_no, pf_number from `tabEmployee` where name ='%s'" % employee)
-    ret = {'bank_name'   : basic_info and basic_info[0][0] or '',
-            'bank_ac_no'  : basic_info and basic_info[0][1] or '',
-            'esic_no'     : basic_info and basic_info[0][2] or '',
-            'pf_no'       : basic_info and basic_info[0][3] or ''}
-    return ret
-   
-  # Make earning and deduction table    
-  #---------------------------------------------------------
-  def make_table(self, doct_name, tab_fname, tab_name):
-    list1 = sql("select name from `tab%s` where docstatus != 2" % doct_name)
-    for li in list1:
-      child = addchild(self.doc, tab_fname, tab_name, self.doclist)
-      if(tab_fname == 'earning_details'):
-        child.e_type = cstr(li[0])
-        child.modified_value = 0
-      elif(tab_fname == 'deduction_details'):
-        child.d_type = cstr(li[0])
-        child.d_modified_amt = 0
-    
-  # add earning & deduction types to table 
-  #---------------------------------------------------------   
-  def make_earn_ded_table(self):           
-    #Earning List
-    self.make_table('Earning Type','earning_details','Salary Structure Earning')
-    
-    #Deduction List
-    self.make_table('Deduction Type','deduction_details', 'Salary Structure Deduction')
-    
+	# Set Salary structure field values
+	#---------------------------------------------------------
+	def get_ss_values(self,employee):
+		basic_info = sql("select bank_name, bank_ac_no, esic_card_no, pf_number from `tabEmployee` where name ='%s'" % employee)
+		ret = {'bank_name': basic_info and basic_info[0][0] or '',
+			'bank_ac_no': basic_info and basic_info[0][1] or '',
+			'esic_no': basic_info and basic_info[0][2] or '',
+			'pf_no': basic_info and basic_info[0][3] or ''}
+		return ret
+	 
+	# Make earning and deduction table		
+	#---------------------------------------------------------
+	def make_table(self, doct_name, tab_fname, tab_name):
+		list1 = sql("select name from `tab%s` where docstatus != 2" % doct_name)
+		for li in list1:
+			child = addchild(self.doc, tab_fname, tab_name, self.doclist)
+			if(tab_fname == 'earning_details'):
+				child.e_type = cstr(li[0])
+				child.modified_value = 0
+			elif(tab_fname == 'deduction_details'):
+				child.d_type = cstr(li[0])
+				child.d_modified_amt = 0
+		
+	# add earning & deduction types to table 
+	#---------------------------------------------------------	 
+	def make_earn_ded_table(self):					 
+		#Earning List
+		self.make_table('Earning Type','earning_details','Salary Structure Earning')
+		
+		#Deduction List
+		self.make_table('Deduction Type','deduction_details', 
+			'Salary Structure Deduction')
+		
 
-  # Check if another active ss exists
-  #---------------------------------------------------------
-  def check_existing(self):
-    ret = sql("select name from `tabSalary Structure` where is_active = 'Yes' and employee = '%s' and name!='%s'" %(self.doc.employee,self.doc.name))
-    if ret and self.doc.is_active=='Yes':
-      msgprint("Another Salary Structure '%s' is active for employee '%s'. Please make its status 'Inactive' to proceed."%(cstr(ret), self.doc.employee))
-      raise Exception
+	# Check if another active ss exists
+	#---------------------------------------------------------
+	def check_existing(self):
+		ret = sql("select name from `tabSalary Structure` where is_active = 'Yes' and employee = '%s' and name!='%s'" %(self.doc.employee,self.doc.name))
+		if ret and self.doc.is_active=='Yes':
+			msgprint("Another Salary Structure '%s' is active for employee '%s'. Please make its status 'Inactive' to proceed."%(cstr(ret), self.doc.employee))
+			raise Exception
 
-  # Validate net pay
-  #---------------------------------------------------------
-  def validate_net_pay(self):
-    if flt(self.doc.net_pay) < 0:
-      msgprint("Net pay can not be negative")
-      raise Exception
-    elif flt(self.doc.net_pay) > flt(self.doc.ctc):
-      msgprint("Net pay can not be greater than CTC")
-      raise Exception      
+	# Validate net pay
+	#---------------------------------------------------------
+	def validate_net_pay(self):
+		if flt(self.doc.net_pay) < 0:
+			msgprint("Net pay can not be negative")
+			raise Exception
+		elif flt(self.doc.net_pay) > flt(self.doc.ctc):
+			msgprint("Net pay can not be greater than CTC")
+			raise Exception			
 
-  # Validate
-  #---------------------------------------------------------
-  def validate(self):   
-    self.check_existing()
-    self.validate_net_pay()
+	def validate(self):	 
+		self.check_existing()
+		self.validate_net_pay()
 
diff --git a/manufacturing/doctype/production_order/production_order.py b/manufacturing/doctype/production_order/production_order.py
index 3ba368e..9a09494 100644
--- a/manufacturing/doctype/production_order/production_order.py
+++ b/manufacturing/doctype/production_order/production_order.py
@@ -34,6 +34,10 @@
 		self.doclist = doclist
 
 	def validate(self):
+		import utilities
+		utilities.validate_status(self.doc.status, ["Draft", "Submitted", "Stopped", 
+			"In Process", "Completed", "Cancelled"])
+
 		if self.doc.production_item :
 			item_detail = sql("select name from `tabItem` where name = '%s' and docstatus != 2"
 			 	% self.doc.production_item, as_dict = 1)
diff --git a/selling/doctype/installation_note/installation_note.py b/selling/doctype/installation_note/installation_note.py
index 1b8590b..5a997fd 100644
--- a/selling/doctype/installation_note/installation_note.py
+++ b/selling/doctype/installation_note/installation_note.py
@@ -8,11 +8,11 @@
 # 
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the
 # GNU General Public License for more details.
 # 
 # You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# along with this program.	If not, see <http://www.gnu.org/licenses/>.
 
 from __future__ import unicode_literals
 import webnotes
@@ -30,178 +30,176 @@
 from utilities.transaction_base import TransactionBase
 
 class DocType(TransactionBase):
-  def __init__(self, doc, doclist=[]):
-    self.doc = doc
-    self.doclist = doclist
-    self.tname = 'Installation Note Item'
-    self.fname = 'installed_item_details'
+	def __init__(self, doc, doclist=[]):
+		self.doc = doc
+		self.doclist = doclist
+		self.tname = 'Installation Note Item'
+		self.fname = 'installed_item_details'
 
-  # Autoname
-  # ---------
-  def autoname(self):
-    self.doc.name = make_autoname(self.doc.naming_series+'.#####')
+	def autoname(self):
+		self.doc.name = make_autoname(self.doc.naming_series+'.#####')
+
+	def validate(self):
+		self.validate_fiscal_year()
+		self.validate_installation_date()
+		self.check_item_table()
+		sales_com_obj = get_obj(dt = 'Sales Common')
+		sales_com_obj.check_active_sales_items(self)
+		sales_com_obj.get_prevdoc_date(self)
+		self.validate_mandatory()
+		self.validate_reference_value()
  
-  
-  #fetch delivery note details
-  #====================================
-  def pull_delivery_note_details(self):
-    self.validate_prev_docname()
-    self.doclist = get_obj('DocType Mapper', 'Delivery Note-Installation Note').dt_map('Delivery Note', 'Installation Note', self.doc.delivery_note_no, self.doc, self.doclist, "[['Delivery Note', 'Installation Note'],['Delivery Note Item', 'Installation Note Item']]")
-  
-  # Validates that Delivery Note is not pulled twice 
-  #============================================
-  def validate_prev_docname(self):
-    for d in getlist(self.doclist, 'installed_item_details'): 
-      if self.doc.delivery_note_no == d.prevdoc_docname:
-        msgprint(cstr(self.doc.delivery_note_no) + " delivery note details have already been pulled. ")
-        raise Exception, "Validation Error. "
-  
-  #Fiscal Year Validation
-  #================================
-  def validate_fiscal_year(self):
-    get_obj('Sales Common').validate_fiscal_year(self.doc.fiscal_year,self.doc.inst_date,'Installation Date')
-  
-  #  Validate Mandatory 
-  #===============================
-  def validate_mandatory(self):
-    # Amendment Date
-    if self.doc.amended_from and not self.doc.amendment_date:
-      msgprint("Please Enter Amendment Date")
-      raise Exception, "Validation Error. "
-  
-  # Validate values with reference document
-  #----------------------------------------
-  def validate_reference_value(self):
-    get_obj('DocType Mapper', 'Delivery Note-Installation Note', with_children = 1).validate_reference_value(self, self.doc.name)
-  
-  #check if serial no added
-  #-----------------------------
-  def is_serial_no_added(self,item_code,serial_no):
-    ar_required = sql("select has_serial_no from tabItem where name = '%s'" % item_code)
-    ar_required = ar_required and ar_required[0][0] or ''
-    if ar_required == 'Yes' and not serial_no:
-      msgprint("Serial No is mandatory for item: "+ item_code)
-      raise Exception
-    elif ar_required != 'Yes' and cstr(serial_no).strip():
-      msgprint("If serial no required, please select 'Yes' in 'Has Serial No' in Item :"+item_code)
-      raise Exception
-  
-  #check if serial no exist in system
-  #-------------------------------------
-  def is_serial_no_exist(self, item_code, serial_no):
-    for x in serial_no:
-      chk = sql("select name from `tabSerial No` where name =%s", x)
-      if not chk:
-        msgprint("Serial No "+x+" does not exist in the system")
-        raise Exception
-  
-  #check if serial no already installed
-  #------------------------------------------
-  def is_serial_no_installed(self,cur_s_no,item_code):
-    for x in cur_s_no:
-      status = sql("select status from `tabSerial No` where name = %s", x)
-      status = status and status[0][0] or ''
-      
-      if status == 'Installed':
-        msgprint("Item "+item_code+" with serial no. "+x+" already installed")
-        raise Exception, "Validation Error."
-  
-  #get list of serial no from previous_doc
-  #----------------------------------------------
-  def get_prevdoc_serial_no(self, prevdoc_detail_docname, prevdoc_docname):
-    from stock.doctype.stock_ledger.stock_ledger import get_sr_no_list
 	
-    res = sql("select serial_no from `tabDelivery Note Item` where name = '%s' and parent ='%s'" % (prevdoc_detail_docname, prevdoc_docname))
-    return get_sr_no_list(res[0][0])
-    
-  #check if all serial nos from current record exist in resp delivery note
-  #---------------------------------------------------------------------------------
-  def is_serial_no_match(self, cur_s_no, prevdoc_s_no, prevdoc_docname):
-    for x in cur_s_no:
-      if not(x in prevdoc_s_no):
-        msgprint("Serial No. "+x+" not present in the Delivery Note "+prevdoc_docname, raise_exception = 1)
-        raise Exception, "Validation Error."
-  
-  #validate serial number
-  #----------------------------------------
-  def validate_serial_no(self):
-    cur_s_no, prevdoc_s_no, sr_list = [], [], []
-    from stock.doctype.stock_ledger.stock_ledger import get_sr_no_list
-    
-    for d in getlist(self.doclist, 'installed_item_details'):
-      self.is_serial_no_added(d.item_code, d.serial_no)
-      
-      if d.serial_no:
+	#fetch delivery note details
+	#====================================
+	def pull_delivery_note_details(self):
+		self.validate_prev_docname()
+		self.doclist = get_obj('DocType Mapper', 'Delivery Note-Installation Note').dt_map('Delivery Note', 'Installation Note', self.doc.delivery_note_no, self.doc, self.doclist, "[['Delivery Note', 'Installation Note'],['Delivery Note Item', 'Installation Note Item']]")
+	
+	# Validates that Delivery Note is not pulled twice 
+	#============================================
+	def validate_prev_docname(self):
+		for d in getlist(self.doclist, 'installed_item_details'): 
+			if self.doc.delivery_note_no == d.prevdoc_docname:
+				msgprint(cstr(self.doc.delivery_note_no) + " delivery note details have already been pulled. ")
+				raise Exception, "Validation Error. "
+	
+	#Fiscal Year Validation
+	#================================
+	def validate_fiscal_year(self):
+		get_obj('Sales Common').validate_fiscal_year(self.doc.fiscal_year,self.doc.inst_date,'Installation Date')
+	
+	#	Validate Mandatory 
+	#===============================
+	def validate_mandatory(self):
+		# Amendment Date
+		if self.doc.amended_from and not self.doc.amendment_date:
+			msgprint("Please Enter Amendment Date")
+			raise Exception, "Validation Error. "
+	
+	# Validate values with reference document
+	#----------------------------------------
+	def validate_reference_value(self):
+		get_obj('DocType Mapper', 'Delivery Note-Installation Note', with_children = 1).validate_reference_value(self, self.doc.name)
+	
+	#check if serial no added
+	#-----------------------------
+	def is_serial_no_added(self,item_code,serial_no):
+		ar_required = sql("select has_serial_no from tabItem where name = '%s'" % item_code)
+		ar_required = ar_required and ar_required[0][0] or ''
+		if ar_required == 'Yes' and not serial_no:
+			msgprint("Serial No is mandatory for item: "+ item_code)
+			raise Exception
+		elif ar_required != 'Yes' and cstr(serial_no).strip():
+			msgprint("If serial no required, please select 'Yes' in 'Has Serial No' in Item :"+item_code)
+			raise Exception
+	
+	#check if serial no exist in system
+	#-------------------------------------
+	def is_serial_no_exist(self, item_code, serial_no):
+		for x in serial_no:
+			chk = sql("select name from `tabSerial No` where name =%s", x)
+			if not chk:
+				msgprint("Serial No "+x+" does not exist in the system")
+				raise Exception
+	
+	#check if serial no already installed
+	#------------------------------------------
+	def is_serial_no_installed(self,cur_s_no,item_code):
+		for x in cur_s_no:
+			status = sql("select status from `tabSerial No` where name = %s", x)
+			status = status and status[0][0] or ''
+			
+			if status == 'Installed':
+				msgprint("Item "+item_code+" with serial no. "+x+" already installed")
+				raise Exception, "Validation Error."
+	
+	#get list of serial no from previous_doc
+	#----------------------------------------------
+	def get_prevdoc_serial_no(self, prevdoc_detail_docname, prevdoc_docname):
+		from stock.doctype.stock_ledger.stock_ledger import get_sr_no_list
+	
+		res = sql("select serial_no from `tabDelivery Note Item` where name = '%s' and parent ='%s'" % (prevdoc_detail_docname, prevdoc_docname))
+		return get_sr_no_list(res[0][0])
+		
+	#check if all serial nos from current record exist in resp delivery note
+	#---------------------------------------------------------------------------------
+	def is_serial_no_match(self, cur_s_no, prevdoc_s_no, prevdoc_docname):
+		for x in cur_s_no:
+			if not(x in prevdoc_s_no):
+				msgprint("Serial No. "+x+" not present in the Delivery Note "+prevdoc_docname, raise_exception = 1)
+				raise Exception, "Validation Error."
+	
+	#validate serial number
+	#----------------------------------------
+	def validate_serial_no(self):
+		cur_s_no, prevdoc_s_no, sr_list = [], [], []
+		from stock.doctype.stock_ledger.stock_ledger import get_sr_no_list
+		
+		for d in getlist(self.doclist, 'installed_item_details'):
+			self.is_serial_no_added(d.item_code, d.serial_no)
+			
+			if d.serial_no:
 
-        sr_list = get_sr_no_list(d.serial_no, d.qty, d.item_code)
-        self.is_serial_no_exist(d.item_code, sr_list)
-        
-        prevdoc_s_no = self.get_prevdoc_serial_no(d.prevdoc_detail_docname, d.prevdoc_docname)
-        if prevdoc_s_no:
-          self.is_serial_no_match(sr_list, prevdoc_s_no, d.prevdoc_docname)
-        
-        self.is_serial_no_installed(sr_list, d.item_code)
-    return sr_list
-  
-  #validate installation date
-  #-------------------------------
-  def validate_installation_date(self):
-    for d in getlist(self.doclist, 'installed_item_details'):
-      if d.prevdoc_docname:
-        d_date = sql("select posting_date from `tabDelivery Note` where name=%s", d.prevdoc_docname)
-        d_date = d_date and d_date[0][0] or ''
-        
-        if d_date > getdate(self.doc.inst_date):
-          msgprint("Installation Date can not be before Delivery Date "+cstr(d_date)+" for item "+d.item_code)
-          raise Exception
-  
-  def validate(self):
-    self.validate_fiscal_year()
-    self.validate_installation_date()
-    self.check_item_table()
-    sales_com_obj = get_obj(dt = 'Sales Common')
-    sales_com_obj.check_active_sales_items(self)
-    sales_com_obj.get_prevdoc_date(self)
-    self.validate_mandatory()
-    self.validate_reference_value()
-  
-  def check_item_table(self):
-    if not(getlist(self.doclist, 'installed_item_details')):
-      msgprint("Please fetch items from Delivery Note selected")
-      raise Exception
-  
-  def on_update(self):
-    webnotes.conn.set(self.doc, 'status', 'Draft')
-  
-  def on_submit(self):
-    valid_lst = []
-    valid_lst = self.validate_serial_no()
-    
-    get_obj("Sales Common").update_prevdoc_detail(1,self)
-    
-    for x in valid_lst:
-      wp = sql("select warranty_period from `tabSerial No` where name = '%s'"% x)
-      wp = wp and wp[0][0] or 0
-      if wp:
-        sql("update `tabSerial No` set maintenance_status = 'Under Warranty' where name = '%s'" % x)
-      
-      sql("update `tabSerial No` set status = 'Installed' where name = '%s'" % x)
-    
-    webnotes.conn.set(self.doc, 'status', 'Submitted')
+				sr_list = get_sr_no_list(d.serial_no, d.qty, d.item_code)
+				self.is_serial_no_exist(d.item_code, sr_list)
+				
+				prevdoc_s_no = self.get_prevdoc_serial_no(d.prevdoc_detail_docname, d.prevdoc_docname)
+				if prevdoc_s_no:
+					self.is_serial_no_match(sr_list, prevdoc_s_no, d.prevdoc_docname)
+				
+				self.is_serial_no_installed(sr_list, d.item_code)
+		return sr_list
+	
+	#validate installation date
+	#-------------------------------
+	def validate_installation_date(self):
+		for d in getlist(self.doclist, 'installed_item_details'):
+			if d.prevdoc_docname:
+				d_date = sql("select posting_date from `tabDelivery Note` where name=%s", d.prevdoc_docname)
+				d_date = d_date and d_date[0][0] or ''
+				
+				if d_date > getdate(self.doc.inst_date):
+					msgprint("Installation Date can not be before Delivery Date "+cstr(d_date)+" for item "+d.item_code)
+					raise Exception
+	
+	def check_item_table(self):
+		if not(getlist(self.doclist, 'installed_item_details')):
+			msgprint("Please fetch items from Delivery Note selected")
+			raise Exception
+	
+	def on_update(self):
+		webnotes.conn.set(self.doc, 'status', 'Draft')
+	
+	def on_submit(self):
+		valid_lst = []
+		valid_lst = self.validate_serial_no()
+		
+		get_obj("Sales Common").update_prevdoc_detail(1,self)
+		
+		for x in valid_lst:
+			wp = sql("select warranty_period from `tabSerial No` where name = '%s'"% x)
+			wp = wp and wp[0][0] or 0
+			if wp:
+				sql("update `tabSerial No` set maintenance_status = 'Under Warranty' where name = '%s'" % x)
+			
+			sql("update `tabSerial No` set status = 'Installed' where name = '%s'" % x)
+		
+		webnotes.conn.set(self.doc, 'status', 'Submitted')
 
-  
-  def on_cancel(self):
-    cur_s_no = []
-    sales_com_obj = get_obj(dt = 'Sales Common')
-    sales_com_obj.update_prevdoc_detail(0,self)
-    
-    for d in getlist(self.doclist, 'installed_item_details'):
-      if d.serial_no:
-        #get current list of serial no
-        cur_serial_no = d.serial_no.replace(' ', '')
-        cur_s_no = cur_serial_no.split(',')
-    
-    for x in cur_s_no:
-      sql("update `tabSerial No` set status = 'Delivered' where name = '%s'" % x)
-      
-    webnotes.conn.set(self.doc, 'status', 'Cancelled')
+	
+	def on_cancel(self):
+		cur_s_no = []
+		sales_com_obj = get_obj(dt = 'Sales Common')
+		sales_com_obj.update_prevdoc_detail(0,self)
+		
+		for d in getlist(self.doclist, 'installed_item_details'):
+			if d.serial_no:
+				#get current list of serial no
+				cur_serial_no = d.serial_no.replace(' ', '')
+				cur_s_no = cur_serial_no.split(',')
+		
+		for x in cur_s_no:
+			sql("update `tabSerial No` set status = 'Delivered' where name = '%s'" % x)
+			
+		webnotes.conn.set(self.doc, 'status', 'Cancelled')
diff --git a/selling/doctype/quotation/quotation.py b/selling/doctype/quotation/quotation.py
index 3b452f1..ed09ab0 100644
--- a/selling/doctype/quotation/quotation.py
+++ b/selling/doctype/quotation/quotation.py
@@ -179,6 +179,10 @@
 	# Validate
 	# --------
 	def validate(self):
+		import utilities
+		utilities.validate_status(self.doc.status, ["Draft", "Submitted", 
+			"Order Confirmed", "Order Lost", "Cancelled"])
+
 		self.validate_fiscal_year()
 		self.validate_mandatory()
 		self.set_last_contact_date()
diff --git a/selling/doctype/sales_order/sales_order.py b/selling/doctype/sales_order/sales_order.py
index e0ac2ff..3e7b03d 100644
--- a/selling/doctype/sales_order/sales_order.py
+++ b/selling/doctype/sales_order/sales_order.py
@@ -226,8 +226,13 @@
 		self.doc.in_words = sales_com_obj.get_total_in_words(dcc, self.doc.rounded_total)
 		self.doc.in_words_export = sales_com_obj.get_total_in_words(self.doc.currency, self.doc.rounded_total_export)
 		
-		# set SO status
-		self.doc.status='Draft'
+		if not self.doc.status:
+			self.doc.status = "Draft"
+
+		import utilities
+		utilities.validate_status(self.doc.status, ["Draft", "Submitted", "Stopped", 
+			"Cancelled"])
+
 		if not self.doc.billing_status: self.doc.billing_status = 'Not Billed'
 		if not self.doc.delivery_status: self.doc.delivery_status = 'Not Delivered'
 		
diff --git a/stock/doctype/delivery_note/delivery_note.py b/stock/doctype/delivery_note/delivery_note.py
index af4d91e..411ce5c 100644
--- a/stock/doctype/delivery_note/delivery_note.py
+++ b/stock/doctype/delivery_note/delivery_note.py
@@ -131,6 +131,9 @@
 
 
 	def validate(self):
+		import utilities
+		utilities.validate_status(self.doc.status, ["Draft", "submitted", "Cancelled"])
+
 		self.so_required()
 		self.validate_fiscal_year()
 		self.validate_proj_cust()
diff --git a/stock/doctype/purchase_receipt/purchase_receipt.py b/stock/doctype/purchase_receipt/purchase_receipt.py
index 5e60753..8c2ad01 100644
--- a/stock/doctype/purchase_receipt/purchase_receipt.py
+++ b/stock/doctype/purchase_receipt/purchase_receipt.py
@@ -148,7 +148,13 @@
 	def validate(self):
 		self.po_required()
 		self.validate_fiscal_year()
-		webnotes.conn.set(self.doc, 'status', 'Draft')			 # set status as "Draft"
+
+		if not self.doc.status:
+			self.doc.status = "Draft"
+
+		import utilities
+		utilities.validate_status(self.doc.status, ["Draft", "Submitted", "Cancelled"])
+
 		self.validate_accepted_rejected_qty()
 		self.validate_inspection()						 # Validate Inspection
 		get_obj('Stock Ledger').validate_serial_no(self, 'purchase_receipt_details')
diff --git a/stock/doctype/serial_no/serial_no.py b/stock/doctype/serial_no/serial_no.py
index b6f60f5..35308bc 100644
--- a/stock/doctype/serial_no/serial_no.py
+++ b/stock/doctype/serial_no/serial_no.py
@@ -65,6 +65,10 @@
 	# validate
 	# ---------
 	def validate(self):
+		import utilities
+		utilities.validate_status(self.doc.status, ["In Store", "Delivered", 
+			"Not in Use", "Purchase Returned"])
+
 		self.validate_warranty_status()
 		self.validate_amc_status()
 		self.validate_warehouse()
diff --git a/stock/doctype/stock_entry/stock_entry.py b/stock/doctype/stock_entry/stock_entry.py
index 2e26a1a..1844032 100644
--- a/stock/doctype/stock_entry/stock_entry.py
+++ b/stock/doctype/stock_entry/stock_entry.py
@@ -17,7 +17,7 @@
 from __future__ import unicode_literals
 import webnotes
 
-from webnotes.utils import cstr, cint, flt, getdate, now
+from webnotes.utils import cstr, cint, flt, getdate, now, comma_or
 from webnotes.model import db_exists, delete_doc
 from webnotes.model.doc import Document, addchild
 from webnotes.model.wrapper import getlist, copy_doclist
@@ -35,6 +35,8 @@
 		self.fname = 'mtn_details' 
 		
 	def validate(self):
+		self.validate_purpose()
+
 		self.validate_serial_nos()
 		pro_obj = self.doc.production_order and \
 			get_obj('Production Order', self.doc.production_order) or None
@@ -57,6 +59,13 @@
 		self.update_stock_ledger(1)
 		# update Production Order
 		self.update_production_order(0)
+
+	def validate_purpose(self):
+		valid_purposes = ["Material Issue", "Material Receipt", "Material Transfer", 
+			"Manufacture/Repack", "Subcontract", "Sales Return", "Purchase Return"]
+		if self.doc.purpose not in valid_purposes:
+			msgprint(_("Purpose must be one of ") + comma_or(valid_purposes),
+				raise_exception=True)
 					
 	def validate_serial_nos(self):
 		sl_obj = get_obj("Stock Ledger")
diff --git a/support/doctype/customer_issue/customer_issue.py b/support/doctype/customer_issue/customer_issue.py
index 44ae891..0a08d82 100644
--- a/support/doctype/customer_issue/customer_issue.py
+++ b/support/doctype/customer_issue/customer_issue.py
@@ -41,9 +41,8 @@
 	
 	def validate(self):
 		if session['user'] != 'Guest' and not self.doc.customer:
-			msgprint("Please select Customer from whom issue is raised")
-			raise Exception
-
+			msgprint("Please select Customer from whom issue is raised",
+				raise_exception=True)
 	
 	def on_cancel(self):
 		lst = sql("select t1.name from `tabMaintenance Visit` t1, `tabMaintenance Visit Purpose` t2 where t2.parent = t1.name and t2.prevdoc_docname = '%s' and	t1.docstatus!=2"%(self.doc.name))
diff --git a/utilities/__init__.py b/utilities/__init__.py
index 486568d..7c44ec3 100644
--- a/utilities/__init__.py
+++ b/utilities/__init__.py
@@ -16,7 +16,8 @@
 
 from __future__ import unicode_literals
 import webnotes
-from webnotes.utils import cint
+from webnotes import _, msgprint
+from webnotes.utils import cint, comma_or
 
 @webnotes.whitelist()
 def get_sc_list(arg=None):
@@ -52,4 +53,8 @@
 			and ifnull(tabReport.disabled,0) != 1
 			order by tabReport.name 
 			limit %s, %s""" % \
-		("%s", cint(limit_start), cint(limit_page_length)), (module,), as_dict=True)
\ No newline at end of file
+		("%s", cint(limit_start), cint(limit_page_length)), (module,), as_dict=True)
+
+def validate_status(status, options):
+	if status not in options:
+		msgprint(_("Status must be one of ") + comma_or(options), raise_exception=True)