erpnext/utilities/demo/demo-login.html

<div class="container">
	<div class="row" style="margin-top: 100px;">
		<div class="col-sm-offset-3 col-sm-6">
			<div class="panel panel-default">
				<div class="panel-heading">
					Start ERPNext Demo
				</div>
				<div class="panel-body">
					<p>
					<input id="lead-email" type="email"
						class="form-control" placeholder="Your Email Id (optional)">
					</p>
					<p>
						<button type="submit" id="login_btn" 
							class="btn btn-primary btn-large">Launch Demo</button>
					</p>
					<hr>
					<p class="text-muted small">Some functionality is disabled for the demo app. The demo data will be cleared regulary. To start your own ERPNext Trial, <a href="https://erpnext.com/pricing-and-signup">click here</a></p>
				</div>
			</div>
		</div>
	</div>
	<div class="row">
	</div>
</div>