Question

jquery form submission prevention using e.preventDefault() is not working in multipart form submission ( when im using ajax to submit ). Is there any way to solve it ?

Code

$('.imgChange').submit( function(e){
    load('do_upload.php',$(this).serialize());
    e.preventDefault();
});

Answer 1

Using normal jQuery library it is not possible sent multipart form using ajax.
There are many other plugin for that.

I recommend jQuery Form Plugin

it is very easy to use. Only you have to do is import that plugin after jQuery

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.js"></script> 
<script src="http://malsup.github.com/jquery.form.js"></script>

then use

$(document).ready(function() { 
        // bind 'myForm' and provide a simple callback function 
        $('#myForm').ajaxForm(function() { 
            alert("Thank you for your comment!"); 
        }); 
    });