diff --git a/accounts/doctype/sales_invoice/pos.js b/accounts/doctype/sales_invoice/pos.js
index 1bd6de1..b5a781c 100644
--- a/accounts/doctype/sales_invoice/pos.js
+++ b/accounts/doctype/sales_invoice/pos.js
@@ -395,7 +395,7 @@
 					});
 					dialog.show();
 					
-					dialog.get_input("total_amount").attr("disabled", "disabled");
+					dialog.get_input("total_amount").prop("disabled", true);
 					
 					dialog.fields_dict.pay.input.onclick = function() {
 						cur_frm.set_value("mode_of_payment", dialog.get_values().mode_of_payment);
diff --git a/public/js/website_utils.js b/public/js/website_utils.js
index 95cae1b..d22d765 100644
--- a/public/js/website_utils.js
+++ b/public/js/website_utils.js
@@ -18,7 +18,7 @@
 
 wn.call = function(opts) {
 	if(opts.btn) {
-		$(opts.btn).attr("disabled", "disabled");
+		$(opts.btn).prop("disabled", true);
 	}
 	
 	if(opts.msg) {
@@ -51,7 +51,7 @@
 		dataType: "json",
 		success: function(data) {
 			if(opts.btn) {
-				$(opts.btn).attr("disabled", false);
+				$(opts.btn).prop("disabled", false);
 			}
 			if(data.exc) {
 				if(opts.btn) {
diff --git a/stock/page/stock_ledger/stock_ledger.js b/stock/page/stock_ledger/stock_ledger.js
index dacd78c..c83fc0e 100644
--- a/stock/page/stock_ledger/stock_ledger.js
+++ b/stock/page/stock_ledger/stock_ledger.js
@@ -100,11 +100,11 @@
 	
 	toggle_enable_brand: function() {
 		if(!this.filter_inputs.item_code.val()) {
-			this.filter_inputs.brand.removeAttr("disabled");
+			this.filter_inputs.brand.prop("disabled", false);
 		} else {
 			this.filter_inputs.brand
 				.val(this.filter_inputs.brand.get(0).opts.default_value)
-				.attr("disabled", "disabled");
+				.prop("disabled", true);
 		}
 	},
 	
diff --git a/stock/page/stock_level/stock_level.js b/stock/page/stock_level/stock_level.js
index 0699b7d..df7c8c5 100644
--- a/stock/page/stock_level/stock_level.js
+++ b/stock/page/stock_level/stock_level.js
@@ -115,11 +115,11 @@
 	
 	toggle_enable_brand: function() {
 		if(!this.filter_inputs.item_code.val()) {
-			this.filter_inputs.brand.removeAttr("disabled");
+			this.filter_inputs.brand.prop("disabled", false);
 		} else {
 			this.filter_inputs.brand
 				.val(this.filter_inputs.brand.get(0).opts.default_value)
-				.attr("disabled", "disabled");
+				.prop("disabled", true);
 		}
 	},
 	
diff --git a/utilities/demo/demo-login.js b/utilities/demo/demo-login.js
index 229d169..509057b 100644
--- a/utilities/demo/demo-login.js
+++ b/utilities/demo/demo-login.js
@@ -3,7 +3,7 @@
     
     $("#login_btn").click(function() {
         var me = this;
-        $(this).html("Logging In...").attr("disabled", "disabled");
+        $(this).html("Logging In...").prop("disabled", true);
         wn.call({
             "method": "login",
             args: {
@@ -12,7 +12,7 @@
                 lead_email: $("#lead-email").val(),
             },
             callback: function(r) {
-                $(me).attr("disabled", false);
+                $(me).prop("disabled", false);
                 if(r.exc) {
                     alert("Error, please contact support@erpnext.com");
                 } else {
@@ -23,5 +23,5 @@
         })
         return false;
     })
-    .attr("disabled", false);
+    .prop("disabled", false);
 })
\ No newline at end of file