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<!DOCTYPE html>
<html>
<head>
<script language="javascript">
function toggleRow(rowId)
{
var r = document.getElementById(rowId);
if (r.style.display == "none")
r.style.display = "inline";
else
r.style.display = "none";
}
function doTest() {
toggleRow('row4');
document.body.offsetWidth;
toggleRow('row4');
document.body.offsetWidth;
toggleRow('row4');
}
</script>
</head>
<body onload="doTest()">
<table border="5">
<tr>
<td>Row 1</td>
</tr>
<tr>
<td>Row 2</td>
</tr>
<tr>
<td>Row 3</td>
</tr>
<tr>
<td id="row4" style="display: none">Row 4</td>
</tr>
</table>
</body>
</html>
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