js两侧浮动广告

<!--下面是两侧广告--><!--广告一开始-->
<SCRIPT>function initEcAd(LName,RName) {
document.all.NowAd_left.style.posTop = -200;
document.all.NowAd_left.style.visibility = 'visible';
document.all.NowAd_left.style.position = 'absolute';
document.all.NowAd_right.style.posTop = -200;
document.all.NowAd_right.style.visibility = 'visible';
document.all.NowAd_right.style.position = 'absolute';
MoveLeftLayer(LName);
MoveRightLayer(RName);
}
function MoveLeftLayer(LName) {
var x = 1;
var y = 150;
LeftName=LName;
eval("var diff = (document.body.scrollTop + y - document.all." + LeftName + ".style.posTop)*.40");
var y = document.body.scrollTop + y - diff;
eval("document.all." + LeftName + ".style.posTop = y");
eval("document.all." + LeftName + ".style.posLeft = x");
setTimeout("MoveLeftLayer(LeftName);", 20);
}
function MoveRightLayer(RName) {
var x = 1;
var y = 150;
RightName=RName;
eval("var diff = (document.body.scrollTop + y - document.all." + RightName + ".style.posTop)*.40");
var y = document.body.scrollTop + y - diff;
eval("document.all." + RightName + ".style.posTop = y");
eval("document.all." + RightName + ".style.posRight = x");
setTimeout("MoveRightLayer(RightName);", 20);
}
document.write("<span id=NowAd_left><a href='<%=url6%>' target='_blank'><img src='<%=pic6%>' WIDTH=70 HEIGHT=350 border=0></img></a></span>"
+"<span id=NowAd_right><EMBED src="Ad/FLASH.swf" mce_src="Ad/FLASH.swf" quality=high WIDTH=70 HEIGHT=350 TYPE='application/x-shockwave-flash' id=EccoolAd></EMBED></a></span>");
initEcAd("NowAd_left","NowAd_right")</SCRIPT>
<!--广告一结束-->