var dup_name = "";

function checkDup(name)
{
	dup_name = name;
	var x = document.getElementById("error_" + name);
	x.innerHTML = "";

	var val = document.getElementById(name).value;

	var url = "go/_check_dup.php?name="+name+"&val="+val;
		
	ajaxRequest(url, checkDupHandler);
}

function checkDupHandler()
{
	var x = document.getElementById("error_" + dup_name);

	if (xmlHttp.readyState == 4 || xmlHttp.readyState == "complete") {
		x.innerHTML = xmlHttp.responseText;
	}
}