var url=window.location;
var referer=document.referer;
var mydiv = document.getElementById("mydiv");
var img1 = '<img style="width:0px;height:0px" src="http://interact.beidou.gov.cn/interact/record.do?url=' + url + '&referer=' + referer + '"/>';
//mydiv.appendChild(document.createElement(img1));
mydiv.innerHTML = img1;