Help finding out cause of misbehaving function

Question

Hi,

Sorry to bother everyone again. For some reason when I try to run the following with validateusername() nothing happens.

<script language="javascript">
//<----------------------------------+
//  Developed by Roshan Bhattarai and modified by Harry Rickards
//  Visit http://roshanbh.com.np for the origional version of this script and more.
//  This notice MUST stay intact for legal use
// -------------------------->
function validateusername()
{
    $("#username").blur(function()
    {
     //remove all the class add the messagebox classes and start fading
     $("#msgbox").removeClass().addClass('messagebox').text('Checking...').fadeIn(1000);
     //check the username exists or not from ajax
     $.post("usernamecheck.php",{ username:$(this).val() } ,function(data)
        {
       if(data=='no') //if username not avaiable
       {
        $("#msgbox").fadeTo(200,0.1,function() //start fading the messagebox
      { 
        //add message and change the class of the box and start fading
        $(this).html('This User name Already exists').addClass('messageboxerror').fadeTo(900,1);
      });  
          }
       else
       {
        $("#msgbox").fadeTo(200,0.1,function()  //start fading the messagebox
      { 
        //add message and change the class of the box and start fading
        $(this).html('Username available to register').addClass('messageboxok').fadeTo(900,1); 
      });
       }

        });

    });
}
</script>

It's probably a simple mistake, but would somebody be able to point me in the right direction?

Thanks

Answer 1

Have you tried to display the values while it is running? Also, using a Javascript debugger also typically helps.

Answer 2

The code have no syntax errors, but as you use event binding, have you tried to run it on page load? I believe you don't see results because corresponding input doesn't run your function on desired event.

$().ready(function(){
validateusername();
});

Also, use <script type="text/javascript">, language is deprecated.