function validationn(uname)
{
	//alert('hi');
	 //var url = 'identifier-check.php?identifier='+identifier;
	 var url = 'functionajax.php?uname=' + uname + '&dummy=' + new Date().getTime();
	//alert(url);
     new Ajax.Request(url,{
     method: 'get',
     onLoading: function(transport)
     {
        // $(dv).show().update('Please wait....');
     },
     onSuccess: function(transport)
     {
         var dr = transport.responseText;
		//alert(dr);
		if(dr=="e")
		{
				document.getElementById('uname').value="";
				document.getElementById('show').innerHTML = "<img src='images/drop.png' border='0'>Please Enter New UserName";
				document.getElementById('uname').focus();
		}
		else
		{
				
				document.getElementById('show').innerHTML = "<img src='images/tick.jpg' border='0'> UserName Available";
				document.getElementById('nname').focus();
		}
		
		
	},
     onFailure: function(transport)
     {
         // when the request fails
         alert('The request failed..');
     },
     onException: function(err)
     {
         // When an exception is encountered while executing the callbacks
       //  alert('Exception');
     }
     });
}