Hi,

I'm migrating some old code to jquery:

 xmlHttp.onreadystatechange = function() {
  if (xmlHttp.readyState == 4) {
   $("#" + ajaxArea).html (xmlHttp.responseText);

   $("#" + ajaxArea).attr('title', 'Login');
   $("#" + ajaxArea).dialog({
    height : 140,
    modal : true
   });
  }
 };

where ajaxArea is the ID of a DIV in the HTML.

The dialog bit is basically adapted from the jQuery example here: http://jqueryui.com/demos/dialog/#modal

All of it works fine up until the last line. Firefox throws an error that simply says "$(" for that line. Anyone know what might be causing this?