网页设计QQ在线问题

上级要求,以前我们的网站两侧都有两个浮动广告条，现在要把广告条改成在线QQ咨询！JS文件里面我看了看，整不明白！求好心朋友帮忙
QQ：6727432
就是这个网页：www.336a.cn 两侧广告条改成在线QQ
附上js文件大家看看
－－－－－－－－－－－－－－
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 = 5;
var y = 100;// 左侧广告距离页首高度
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 = parseInt(y)");
eval("document.all." + layerName + ".style.posLeft = x");
setTimeout("MoveLeftLayer(