code stopped working...? Options

[MasterChief16]

<script language="Javascript">
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>

a while back someone gave me that script, it allows the page to flip, or the left module moves to the right. anyways, it did work, for a while, but i think a few days ago it stopped working. everytime i went to my xanga there was an error that popped up, saying cannot load this page.

so, i went into admin mode and took out all of the scripts and codes and put them back in one by one. when i got to the one above, my xanga had an error. i placed all of the codes back except that one and it worked. as soon as i put that one in it conks out.

so, is there any other code that allows you to move the left module to the right? or is this the only one?