var SH;

function CheckUser(sKey){
	var uname = window.document.signup.uname.value;
	SH=sKey;
	if(uname=='') {
		//alert('Please enter the your email id');
	}else{
	
	var regex = /^[\w]+(\.[\w]+)*@([\w\-]+\.)+[a-zA-Z]{2,7}$/ ;
	if(!regex.test(uname))
		{
			alert('Please enter a valid email id');
		}else{
			div = document.getElementById('ucheck');
			div.innerHTML = "<img src='imgs/loading.gif' start='fileopen'>";
			setTimeout(ProcessUserValidation,3000);
		}
	}
} 

function ClearUser()
{
div = document.getElementById('valid');
div.innerHTML = "";
div = document.getElementById('ucheck');
div.innerHTML = "";
}

function ProcessUserValidation(sKey){
var uname = window.document.signup.uname.value;
var url = "checkuser.php?skey=" + SH + "&uname=" + uname;
postRequest(url);
}