让left的高度等于 center的高度..........
<div id=left></div>
<div id=center></div>
<script type="text/javascript">
document.getElementById("left").style.height = document.getElementById("center").offsetHeight + "px";
</script>
让left的高度等于 center的高度..........
<div id=left></div>
<div id=center></div>
<script type="text/javascript">
document.getElementById("left").style.height = document.getElementById("center").offsetHeight + "px";
</script>