function Adv_3() {
document.all.AdLayer1.style.posTop = -200;
document.all.AdLayer1.style.visibility = 'visible'
document.all.AdLayer2.style.posTop = -200;
document.all.AdLayer2.style.visibility = 'visible'
MoveLeftLayer('AdLayer1');
MoveRightLayer('AdLayer2');
}
function MoveLeftLayer(layerName) {
var x = 5;
var y = 100;// 左侧广告距离页首高度
var diff = (document.documentElement.scrollTop + y - document.all.AdLayer1.style.posTop)*.40;
var y = document.documentElement.scrollTop + y - diff;
eval("document.all." + layerName + ".style.posTop = parseInt(y)");
eval("document.all." + layerName + ".style.posLeft = x");
setTimeout("MoveLeftLayer('AdLayer1');", 20);
}
function MoveRightLayer(layerName) {
var x = 5;
var y = 100;// 右侧广告距离页首高度
var diff = (document.documentElement.scrollTop + y - document.all.AdLayer2.style.posTop)*.40;
var y = document.documentElement.scrollTop + y - diff;
eval("document.all." + layerName + ".style.posTop = y");
eval("document.all." + layerName + ".style.posRight = x");
setTimeout("MoveRightLayer('AdLayer2');", 20);
}

if(document.body.clientWidth>800)
 {
   document.write("<div id=AdLayer1 style='position: absolute;visibility:hidden;z-index:1'><p><img height='360' width='100' border='0' alt='' src='/upload/FCKeditor/2015-02/20150203150002.jpg' /></p></div>"
  +"<div id=AdLayer2 style='position: absolute;visibility:hidden;z-index:1'><p><img height='360' width='100' border='0' alt='' src='/upload/FCKeditor/2015-02/20150203150001.jpg' /></p></div>");
   Adv_3();
 }