Works in FireFox. Does not work in IE8 or Chrome:
<script>
$('.PageText_L657n').closest('td').find('.pricecolor').addClass('ice1');
</script>
Should be a line-through "Regular Price:$ XX.XX" if "Click To Get Today's Special Price" appears in the table.
Wrap your code in ready handler:
Since you are manipulating the DOM, you need the ready handler which firs as soon as DOM becomes ready.
Also make sure element with class
PageText_L657n
is there is pointed out by @T.J Crowder.