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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>hello</title>
</head>
<body>
<table id="table" width="1000" border="1" height="900">
<tr>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr>
<td> </td>
<td> </td>
<td> </td>
</tr>
</table>
</body>
</html>
<script>
var body_height =document.body.clientHeight;
var table_height = document.getElementById("table").clientHeight;
alert("body_height"+body_height+"ssssss" + table_height)
if(body_height>table_height){
document.getElementById("table").style.width = "100%";
}else{
document.getElementById("table").style.width = "99%";
}
</script>