what does this code do, confused im lookin bak at my codes Options

[*dumball*]

<script language="Javascript">
// original by sean http://www.xanga.com/seanmeister
var tds = document.getElementsByTagName("td");
for (var i = 0; i < tds.length; i++){
if (tds[i].width == "200"){
tds[i].parentNode.appendChild(tds[i].cloneNode(true));
tds[i].parentNode.removeChild(tds[i]);
break;
}}
</script>