<!doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title>Test Document</title>
<script language="JavaScript">
function changeWidth()
{
    var table = document.getElementById('test_table');

    table.style.width = 400;

    return false;
}
</script>
</head>
<body onload="changeWidth()">

<table id="test_table" width="200" style="border: 1px solid blue;">
<tr>
<td>
</td>
</tr>
</table>


</body>
</html>