function isUnion()
{
	var webUrl = "http://hao.zgyhbz.com/AjaxComeSite.asp?Url=";
	//var webUrl = "AjaxComeSite.asp?Url=";
	var comUrl = document.referrer.toString();   //得到上页来源
	var thisUrl = window.location.href.toString();  //得到当前页URL,用于分析URL中是否包含"union"
	var sendUrl = "";
	if(thisUrl.indexOf("union")>=0 && comUrl != "")
        {
		comUrl = comUrl.split("/")
		sendUrl = comUrl[2]  //得到如www.zgyhbz.com的地址
		var xmlhttp;
		try
                {
			xmlhttp= new ActiveXObject('Msxml2.XMLHTTP');
		}
                catch(e)
                {
			try
                        {
				xmlhttp= new ActiveXObject('Microsoft.XMLHTTP');
			}
                        catch(e)
                        {
				try
                                {
				  xmlhttp= new XMLHttpRequest();
				}catch(e){}
			}
		}
		xmlhttp.open("get",webUrl + sendUrl);
		xmlhttp.onreadystatechange=function(){};
		xmlhttp.send(null);
	}
}