拖动table标题实现改变td的大小(css+js代码)

代码如下:

<html>
<title>拖动列宽的表格</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<style type="text/css"><!--
.bg td{
font-size:12px;
text-align:left;
line-height:15px;
height:20px;
}
.bg td.tit{
background-color:#e2e2e2;
height:17px;
text-align:center;
line-height:15px;
}
.bg td.num{
background-color:#e2e2e2;
text-align:right;
line-height:15px;
width:30px;
height:22px;
}
.resizeDivClass{
text-align:right;
width:1px;
margin:0px 0 0px 0;
background:#fff;
border:0px;
float:right;
cursor:e-resize;
}
--></style>
<script language="javascript"><!--
function MouseDownToResize(obj){
setTableLayoutToFixed();
obj.mouseDownX=event.clientX;
obj.pareneTdW=obj.parentElement.offsetWidth;
obj.pareneTableW=theObjTable.offsetWidth;
obj.setCapture();
}
function MouseMoveToResize(obj){
if(!obj.mouseDownX) return false;
var newWidth=obj.pareneTdW*1+event.clientX*1-obj.mouseDownX;
if(newWidth>10)
{
var theObjTable = document.getElementById("theObjTable");
obj.parentElement.style.width = newWidth;
theObjTable.style.width=obj.pareneTdW*1+event.clientX*1-obj.mouseDownX;
}
}
function MouseUpToResize(obj){
obj.releaseCapture();
obj.mouseDownX=0;
}
function setTableLayoutToFixed()
{
var theObjTable = document.getElementById("theObjTable");
if(theObjTable.style.tableLayout=='fixed') return;
var headerTr=theObjTable.rows[0];
for(var i=0;i<headerTr.cells.length;i++)
{
headerTr.cells[i].styleOffsetWidth=headerTr.cells[i].offsetWidth;
}
for(var i=0;i<headerTr.cells.length;i++)
{
headerTr.cells[i].style.width=headerTr.cells[i].styleOffsetWidth;
}
theObjTable.style.tableLayout='fixed';
}
function theObjTable(o,a,b,c){
var t=document.getElementById(o).getElementsByTagName("tr");
for(var i=0;i<t.length;i++){
t[i].style.backgroundColor=(t[i].sectionRowIndex%2==0)?a:b;
t[i].onclick=function(){
if(this.x!="1"){
}else{
this.x="0";
this.style.backgroundColor=(this.sectionRowIndex%2==0)?a:b;
}
}
t[i].onmouseover=function(){
if(this.x!="1")this.style.backgroundColor=c;
}
t[i].onmouseout=function(){
if(this.x!="1")this.style.backgroundColor=(this.sectionRowIndex%2==0)?a:b;
}
}
}
// --></script>
<body>
<table width="100%" class="bg" border=1 cellspacing=0 bordercolorlight="#7b7b7b" bordercolordark="#efefef" id="theObjTable">
<tr>
<td class="num">序号</td>
<td width="100px" class="tit">
<span class="resizeDivClass" onMouseDown="MouseDownToResize(this);" onMouseMove="MouseMoveToResize(this);" onMouseUp="MouseUpToResize(this);"></span>
公司名称
</td>
<td class="tit">
<span class="resizeDivClass" onMouseDown="MouseDownToResize(this);" onMouseMove="MouseMoveToResize(this);" onMouseUp="MouseUpToResize(this);"></span>
订单客户
</td>
<td class="tit">
<span class="resizeDivClass" onMouseDown="MouseDownToResize(this);" onMouseMove="MouseMoveToResize(this);" onMouseUp="MouseUpToResize(this);"></span>
部门
</td>
<td class="tit">
<span class="resizeDivClass" onMouseDown="MouseDownToResize(this);" onMouseMove="MouseMoveToResize(this);" onMouseUp="MouseUpToResize(this);"></span>
业务员
</td>
<td class="tit">
<span class="resizeDivClass" onMouseDown="MouseDownToResize(this);" onMouseMove="MouseMoveToResize(this);" onMouseUp="MouseUpToResize(this);"></span>
交款方式
</td>
</tr>
<tr>
<td class="num" >1</td>
<td >中国电信</td>
<td >订单客户名称</td>
<td >广告部</td>
<td >王天一</td>
<td >现金</td>
</tr>
<tr>
<td class="num" >2</td>
<td >中国移动</td>
<td >订单客户名称</td>
<td >营销部</td>
<td >李小红</td>
<td >信用卡</td>
</tr>
<tr>
<td class="num" >3</td>
<td >中国联通</td>
<td >订单客户名称</td>
<td >市场部</td>
<td >王老二</td>
<td >银行卡</td>
</tr>
</table>
<script language="javascript"><!--
//senfe("表格名称","奇数行背景","偶数行背景","鼠标经过背景","点击后背景");
theObjTable("theObjTable","#c0c0c0","#fff","#a3a2a2");
// --></script>
</body>
</html>