<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td id="tab1" onclick="bgcolor()">点击变色</td>
</tr>
</table><script language="JavaScript">
<!--
function bgcolor()
{
var object=document.getElementById("tab1");
alert(object);
object.style.background="#000000";
}
//-->
</script>
<tr>
<td id="tab1" onclick="bgcolor()">点击变色</td>
</tr>
</table><script language="JavaScript">
<!--
function bgcolor()
{
var object=document.getElementById("tab1");
alert(object);
object.style.background="#000000";
}
//-->
</script>
<script>
function bgcolor()
{
var object=document.getElementById("tab1");
alert(object);
object.style.background="#000000";
}
</script>
</head><body><table width="100%" border="1" cellspacing="0" cellpadding="0">
<tr>
<td id="tab1" onClick="javascript:bgcolor()">点我变色</td>
</tr>
</table></body>