单击表格，取得td内内容
<HTML>
<HEAD>
<script>
function select()
{
var tdArr=document.getElementsByTagName("td");
for(var i=0;i<tdArr.length;i++)
{
tdArr[i].onclick=function()
{
alert(this.innerHTML);
}
}
}
</script>
</HEAD>
<BODY onload="select();">
<table width="100%" border=1>
<tr><td>1111111</td><td>1111111</td><td>1111111</td><td>1111111</td></tr>
<tr><td>22222222</td><td>1111111</td><td>1111111</td><td>1111111</td></tr>
<tr><td>3333333</td><td>1111111</td><td>1111111</td><td>1111111</td></tr>
<tr><td>44444444</td><td>1111111</td><td>1111111</td><td>1111111</td></tr>
<tr><td>5555555555</td><td>1111111</td><td>1111111</td><td>1111111</td></tr>
<tr><td>66666666666</td><td>1111111</td><td>1111111</td><td>1111111</td></tr>
</table>
</BODY>
</HTML>