function doCheckUserExists()
{


       
		document.getElementById("user").innerHTML = "";
		document.getElementById("profileurl").innerHTML = "";
	var username = document.userreg.email.value;

	if(username.length > 0)
	{
      var loadingImg = document.createElement('img');
      loadingImg.src = 'images/working.gif';
      document.getElementById("user").appendChild(loadingImg);
      //document.getElementsByTagName('p')[0].appendChild(loadingImg);
     }

	if(username.length > 0 )
	{
		var urltocheck = "chkuser.asp?txtUsername=" + username;
		//alert(urltocheck);
	    var xmlhttp
		
		try{
		xmlhttp = new XMLHttpRequest();
		} catch (e){
			try{
				xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
			} catch (e) {
				try{
					xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
				} catch (e){
					alert("Your browser broke!");
					return false;
				}
			}
		}
		
	    xmlhttp.open('GET', urltocheck, true);    	
	
		var objDetails="";
		xmlhttp.onreadystatechange = function() 
		{
			if (xmlhttp.readyState == 4)
			{
				objDetails = xmlhttp.responseText;
				document.getElementById("user").innerHTML = objDetails;
				//alert(objDetails.indexOf("Not Available"));
				if(objDetails.indexOf("Not Available") == -1)
				{
					document.getElementById("profileurl").innerHTML = "";
				}
			}
		}
		xmlhttp.send(null);
	}
}