imgpath = "AD_images/a01.jpg";
imgurl = "http://www.cqtzlcw.com/wxjr/index.html";


document.writeln("<a href="+imgurl+" target=_blank><img src=\"\/AD_images\/a01.jpg\" width=\"255\" height=\"96\" border=\"0\" id=\"a01a1\" name=\"a01a1\" \/><\/a>");

var a01a1pre = new Image();
a01a1pre.src = imgpath;
a01a1pre.onload=function(){
document.getElementById("a01a1").src = a01a1pre.src;
}