setTimeout 用例
<table border="1">
<tr id="msg" >
<td>aa</td>
<td>aa</td>
<td>aa</td>
<td>aa</td>
</tr>
<tr>
<td>b</td>
<td>b</td>
<td>bb</td>
<td>bb</td>
</tr>
<tr>
<td>cc</td>
<td>cc</td>
<td>cc</td>
<td>cc</td>
</tr>
</table>
<script type="text/javascript">
setTimeout("timedCount()",2000);
function timedCount(){
document.getElementById('msg').style.display="none";
}
</script>
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