function checkUsername()
{
	var ajax = getXMLHttpRequestObject();
	if(ajax) {
		document.getElementById('userChecked').innerHTML = '<img src="http://www.10to1.com/Images/Site_Images/animate/w6.gif">';
		var username = document.getElementById('user').value;
		ajax.open("GET", 'checkUsername.php?user='+ escape(username) +"&" + Math.random());
		ajax.onreadystatechange = function() {
			handleUNResponse(ajax);
		}
		ajax.send(null);
	}
}
function handleUNResponse(ajax)
{
	if (ajax.readyState == 4)
	{
		results = ajax.responseText;
		document.getElementById('userChecked').innerHTML = results;
	}
}