在听装啤酒底部开口:JS广告条

请问大家。广告调用的JS调用怎么搞啊？
<script src="http://www.1000stu.cn/advertisement.js" language="javascript"></script>
这样可以搞的吗？
但是文件出来怎么有错啊？
JS文件里面的代码是：
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 = 0;
var y = 0;
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(RightName) {
var x = 10;
var y = 100;
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='' target=''><img src='' WIDTH=0 HEIGHT=0 border=0></img></a></span>"
+"<span id=NowAd_right><iframe frameborder=0 marginwidth=0 marginheight=0 scrolling=no width=150 height=250 src="http://www.1000stu.cn/incs/js-diaoy.asp"></iframe></span>");
initEcAd("NowAd_left","NowAd_right")
请大家帮帮我啊~！！！