两边漂浮图片的一段JS

 function initEcAd() {
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 = 0;
var y = 95;
var diff = (document.body.scrollTop + y - document.all.AdLayer1.style.posTop)*.40;
var y = document.body.scrollTop + y - diff;
eval("document.all." + layerName + ".style.posTop = y");
eval("document.all." + layerName + ".style.posLeft = x");
setTimeout("MoveLeftLayer('AdLayer1');", 20);
}
function MoveRightLayer(layerName) {
var x = 0;
var y = 95;
var diff = (document.body.scrollTop + y - document.all.AdLayer2.style.posTop)*.40;
var y = document.body.scrollTop + y - diff;
eval("document.all." + layerName + ".style.posTop = y");
eval("document.all." + layerName + ".style.posRight = x");
setTimeout("MoveRightLayer('AdLayer2');", 20);
}
//document.write("<div id=AdLayer1 style='position: absolute;visibility:hidden;z-index:1'><EMBED src='/web/images/100x300.swf' quality=high WIDTH=100 HEIGHT=300 TYPE='application/x-shockwave-flash' id=addouble></EMBED></a></div>"
//           +"<div id=AdLayer2 style='position: absolute;visibility:hidden;z-index:1'><EMBED src='/web/images/100x300.swf' quality=high WIDTH=100 HEIGHT=300 TYPE='application/x-shockwave-flash' id=addouble></EMBED></div>");
//initEcAd()

var left_img='<a href=/web/agent_new.shtml><img src="/web/images/zhaoshang1.gif" border=0 id=addouble></a>'
//如果是FLASH 则为
//var left_img='<EMBED src="/web/images/100x300.swf" quality=high WIDTH=100 HEIGHT=300 TYPE="application/x-shockwave-flash" id=addouble></EMBED>'
var right_img='<a href=/web/agent_new.shtml><img src="/web/images/zhaoshang2.gif" border=0></a>';
//var right_img='<EMBED src="/web/images/100x300.swf" quality=high WIDTH=100 HEIGHT=300 TYPE="application/x-shockwave-flash" id=addouble></EMBED>'

//document.write("<div id=AdLayer1 style='position: absolute;visibility:hidden;z-index:1'><a href=/web/agent_new.shtml><img src='/web/images/zhaoshang1.gif' border=0></a></div>"
// +"<div id=AdLayer2 style='position: absolute;visibility:hidden;z-index:1'><a href=/web/agent_new.shtml><img src='/web/images/zhaoshang1.gif' border=0></a></div>");
//initEcAd()
document.write("<div id=AdLayer1 style='position: absolute;visibility:hidden;z-index:1'>"+left_img+"</div>"
 +"<div id=AdLayer2 style='position: absolute;visibility:hidden;z-index:1'>"+right_img+"</div>");
initEcAd()

//经过测试有效,适合挂图片和FLASH