Add this bit of code to your html header of the page


$("document").ready(function() {
$(':text').each(function(index) {
  // Build anchor tag for clear
   var clrLink = ' <a href="javascript:clearVal(\'' + $(this).attr("id") + '\');" class="clr">
<img src="/i/menu/inline_error_16x16.gif" alt="Clear" title="Clear"></a>';
  // Add it after the text items
   $(this).after(clrLink);
  });
});

function clearVal(pId)
{
  $s(pId,'');
  // Do whatever you want here ...
}