function createXMLHttpRequest()
{
	XmlHttp=null;
	if (window.ActiveXObject)
	{
		XmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
	} 
	else if (window.XMLHttpRequest) 
	{
		XmlHttp = new XMLHttpRequest();
	}
}	

function ChkUidRe(sUid)
{
	if (sUid != null && sUid != "")
	{
		var sUrl = "js/ChkUid.aspx?uid=" + sUid;
		createXMLHttpRequest();
		XmlHttp.Open("GET",sUrl,true);
		XmlHttp.onreadystatechange = function(){	
			if (XmlHttp.readyState == 4 && XmlHttp.status == 200)		
			{
				var sResult = XmlHttp.responseText;
				if (sResult == "True")
				{
					document.all.item("lbl_UidRe").innerHTML = sUid + " 已经有人使用，请重新选择！";
				}
				else
				{
					document.all.item("lbl_UidRe").innerHTML = "";
				}
			}
		}
		XmlHttp.send(null);
	}
}