[notice88]

in this code. i am performing a check if the value is already existing in the database. if the value is existing, i want to the form to submit, and if not, i want to prevent it from submission by using return false. but its not working. can u tell me whats wrong? And also, is there any way i can take out the 'msg'
variable outside the $.ajax({});? i tried return msg; after the condition and tried alerting it in the onsubmitCheckControlNumber() function but still not working.

<script type ='text/javascript'>
     function onsubmitCheckControlNumber(){
		
		var username = $("#ControlNumber").val();
		
		$.ajax({
				type: "POST",  
				url: "php/CheckControlNumber.php",  
				data: "username="+ username,  
				success: function(msg){  
					
					if(msg == 1)
					{
						$("form#FormUpload").submit();
					}else
					{
						return false;
					}
				return msg;
			}//END success: function(msg){		
		});//END of $.ajax({
		
	
		
	}
     
     </script>

This post has been edited by notice88: 24 June 2012 - 07:54 AM

[notice88]

well what i did was i disabled the submit button when the control number already exist in the database and enable it if not.. but for further reference. can you answer it? thanks.. im new to javascript

This post has been edited by Dormilich: 24 June 2012 - 11:56 AM
Reason for edit:: removed self-quote

[Dormilich]

the problem is that this is not HTML inline event handling. returning something (esp. from an asynchronous call) from a callback function does not have any effect.

[notice88]

is there anything thats need to be added?

[Dormilich]

it’s a totally different concept. there is nothing to be added, there is the programme logic to be changed.

if onsubmitChangeNumber() is tied to the submit button, you have to cancel the submit button’s action. you either do that by making it a click button or by killing the submit button’s default action (submitting the form) either via return false in the inline handler or by calling the Event’s preventDefault() method.