为什么js效果没有显示？

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style type="text/css">
div{width: 609; font-size: 40pt; font-family: Tahoma;font-weight: bold;}
</style>
<script type="text/javascript">
var count=0; var thePhase=0; var aniOn=0;
var theStrength=0;var maxCount=40;var maxStrength=100;var theCount=0;
var colorList=new Array("red", "blue", "green");
var oDiv=null;
var oQueue=new Array();
function doStart(obj)
{
oDiv=obj;
oQueue.push("Welcome to 51js!");
oQueue.push("Hello Friends!");
oQueue.push("I love you");
if(obj==null)return;
if(!oQueue.length)return;
oDiv.innerHTML=oQueue.shift();
var ctrlRng=document.body.createControlRange()
ctrlRng.add(oDiv)
ctrlRng.select();
ctrlRng.execCommand("SelectAll")
    theCount=0;
doFilt();
}function getStrength(pos)
{
var ret=0
if(pos<maxCount)
{
ret=maxStrength*pos*pos/(maxCount*maxCount);
}
else if(pos==maxCount)
{
strNext=oQueue.shift()
oDiv.innerHTML=strNext;
rndNum=Math.floor(Math.random() * 3)
oDiv.style.filter+="glow(color=" +  colorList[rndNum] + ", strength=5)"
ret=maxStrength;
}
else if(pos<2*maxCount)
{
pos=2*maxCount-pos;
ret=maxStrength*pos*pos/(maxCount*maxCount);
}
else
ret=0;
ret=Math.ceil(ret)
return ret;
}function anitext(){
  thePhase=(thePhase + 10)
  oDiv.filters[0].phase=thePhase
  theStrength=getStrength(++theCount);
  window.status=theStrength
  if(theStrength==0)theCount=0;  if(oQueue.length>0 || theStrength>0)
  {
    oDiv.filters[0].strength=theStrength;
    oTO=window.setTimeout("anitext()",0200,"JavaScript")
  }
}function doFilt(){
  oDiv.style.filter="wave(add=0, freq=3, lightstrength=50, phase=0, strength=2, enabled=1); "
  rndNum=Math.floor(Math.random() * 3)
  oDiv.style.filter+="glow(color=" +  colorList[rndNum] + ", strength=5)"
  anitext()
}function removeFilt(){
  window.clearTimeout(oTO)
  oDiv.style.filter=" "
}function arrPush(item)
{
this[this.length]=item;
}function arrShift()
{
var item=this[0];
var nLen=this.length;
for(var i=0;i<nLen-1;i++)
this[i]=this[i+1];
this.length--;
return item;
}Array.prototype.push=arrPush;
Array.prototype.shift=arrShift;</script>
</head><body onload="doStart(myDiv)">
<div id="myDiv" align="center">
</div>
</body>
</html>