我要通过鼠标拖动表格宽度变化不知错在哪

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<style>
.tabletitle {
font: icon;
color: buttontext;
background: threedhighlight;
border-top:1px solid #000000;
border-right: 1px solid #000000;
border-left-style: solid;
border-bottom-style: none;
border-left-width: 1px;
border-left-color: #000000;
}
.tabletitleTD {
background: #0099FF;
overflow:hidden;
height:15;
border-left:1px solid buttonhighlight;
border-right:1px solid buttonshadow;
border-top:1px solid buttonhighlight;
border-bottom:1px solid buttonshadow;
color: #FFFFFF;
}
.tableAct {
background: #FFFFFF;
font: icon;
color: buttontext;
border-right: 1px solid threedshadow;
}
.tableAct TD{
border-left: 1px solid buttonshadow;
}
.tdwbar{
cursor:w-resize;
background:buttonface;
behavior:url(dragline.htc);
}
.tt {
background-color: #FFFFFF;
border-top: 1px none #666666;
border-right: 1px none #666666;
border-bottom: 1px solid #666666;
border-left: 1px none #666666;
white-space: nowrap;
}
.myscroll{FONT-SIZE: 12px;SCROLLBAR-HIGHLIGHT-COLOR: #FFFFFF;SCROLLBAR-SHADOW-COLOR: #e1e1e1;SCROLLBAR-3DLIGHT-COLOR: #e1e1e1;SCROLLBAR-TRACK-COLOR: white;  SCROLLBAR-DARKSHADOW-COLOR: white; scrollbar-Base-Color: white; scrollbar-arrow-Color:}
</style>
<SCRIPT LANGUAGE="JavaScript">
<!--
function TTable(name){
    this.name=name;
this.cols=new Array();
this.rows=new Array();
this.items=new Array();
this.colcount=0;//实际是列输减一
this.rowcount=0;
this.data=new Array();
//style
this.width=100;//colum width
this.bgc="#e7e7e7";
this.fontfamily="tahoma,arial,helvetica";
    //method
this.addData=addData;
this.trimData=trimData;
this.create=create;
this.display=display;
this.refresh=refresh;
}
function TItem(owner,name,data,rindex,cindex,width,bgc,ftc){
    this.owner=owner;
this.name=name;
this.data=data;
this.rindex=rindex;
this.cindex=cindex;
this.width=width||owner.width;
this.bgc=bgc||owner.bgc;
this.htmlcode=!rindex?'\n<TD width="100" class="tabletitleTD" >'+data+'</TD>\n<TD width="2" rowspan="'+owner.colcount+'" class="tdwbar" ></TD>':'\n<TD class="tt">'+data+'</TD>';
}function addData(){
    var arg=addData.arguments;
    var len=arg.length;
this.colcount=Math.max(this.colcount,len);
    var tmpdata=new Array();
for(i=0;i<this.colcount;i++){
    tmpdata[i]=!arg[i]?'':arg[i];
}
this.data[this.data.length]=tmpdata;
}
function trimData(){
    for(i=0;i<this.data.length;i++){
    for(j=0;j<this.colcount;j++){
    this.data[i][j]=!this.data[i][j]?'&nbsp;':this.data[i][j];
}
}
}
function create(){
    for(i=0;i<this.data.length;i++){
    this.items[i]=new Array;
for(j=0;j<this.colcount;j++){
    this.items[i][j]=new TItem(this,this.data[i][j],this.data[i][j],i,j)
}
    }
}
function display(){
    this.htmlcode='';
this.htmlcode+='\n<div id="MainBG" style="position:absolute; left:100px; top:180px; z-index:1; ;border: 1px none #000000;overflow:auto;" class=myscroll>'
                     +'\n<div id="TableBG" style="position:absolute; left:0px; top:0px; z-index:2; border: 1px none #000000">'
 +'\n<TABLE  border="0" cellPadding="0" cellSpacing="0"  class="tabletitle" id="tb1">'; for(i=0;i<this.data.length;i++){
    this.htmlcode+='\n<tr>';
    for(j=0;j<this.colcount;j++){
   this.htmlcode+=this.items[i][j].htmlcode;
}
this.htmlcode+='\n</tr>';
    }
this.htmlcode+='</table></div></div>';
// alert(this.htmlcode)
document.write(this.htmlcode)
}
/*******************  drag function  ************************/
function TDrag(){
   this.x1=null;
   this.x2=null;
   this.obj=null;
   this.tableW=null;
   this.tdW=null;
   this.table=null;
   this.targetTD=null;
}
function getTdSid(sid){
   var targetSID=sid-1;
   while(document.all[targetSID].tagName!='TD'){targetSID--}
   return targetSID
}
function mDown(){
    oDrag.obj=window.event.srcElement;
    if(oDrag.obj.tagName=='TD'&&oDrag.obj.rowSpan!=1){
     document.body.style.cursor="e-resize";
    var targetSID=getTdSid(event.srcElement.sourceIndex);
        oDrag.targetTD=document.all[targetSID];
oDrag.table=event.srcElement.parentElement.parentElement.parentElement;
    oDrag.tableW=table.clientWidth;
    oDrag.x1=event.x
}else{
    oDrag.obj=null;
    return false
}
}
function mMove(){
   if(!oDrag.obj)return false;
   try{
   if(window.event.x>=(MainBG.offsetLeft+MainBG.clientWidth))return false;
oDrag.x2=event.x;
var dW=oDrag.x2-oDrag.x1;
oDrag.targetTD.style.width=oDrag.targetTD.clientWidth+dW
oDrag.table.style.width=dW+oDrag.tableW;//------------>!!!
}
catch(x){}
}
function mUp(){
  document.body.style.cursor="default";
  oDrag.obj=null;
}
function refresh(){
   table=TableBG.children[0]
   TableBG.style.width=table.clientWidth;
   TableBG.style.height=table.clientHeight;
   MainBG.style.width=(TableBG.clientHright>=500)?500:TableBG.clientWidth;
   MainBG.style.height=(TableBG.clientHright>=500)?500:TableBG.clientHeight+16;//默认,高度超过500px使用滚动
}
function dragInit(){
       oDrag=new TDrag();
   document.onmousedown = mDown
   document.onmousemove = mMove
   document.onmouseup = mUp;
}
//-->
</SCRIPT>
</HEAD><BODY onload="dragInit()"><SCRIPT LANGUAGE="JavaScript">
<!--
ot=new TTable();
ot.addData('name','email','phoneCode','address','homepage','oicq')
ot.addData('llrock','[email protected]','123456789','Beijing','user1.7host.com/ccrock','1234567')
ot.addData(1,2,3,4)
ot.addData(1,2,'',4,5,6)
ot.addData(1,2,3,4,5)
//ot.data=[[1,2,3,4],2,3]
ot.trimData()
ot.create()
ot.display()
ot.refresh()
//-->
</SCRIPT>
</BODY>
</HTML>
这是我搜集的，这里的朋友曾经帖的。很好用。