Javascript and IE7

Just a quick post. Something to look for with Internet Explorer 7 and Javascript (not JQuery specifically). The following will work fine in IE8, FF and even IE6, but not IE7:

$("#foo").validate({
    rules: {
      firstname: 'required',
      lastname: 'required',
      phone: 'required',
      email: {required:true,email:true},
      street: 'required',
      city: 'required',
      state: 'required',
      postcode: 'required',
      service_areas: 'required',
    }
  });

Whereas this will:

$("#foo").validate({
    rules: {
      firstname: 'required',
      lastname: 'required',
      phone: 'required',
      email: {required:true,email:true},
      street: 'required',
      city: 'required',
      state: 'required',
      postcode: 'required',
      service_areas: 'required'
    }
  });

Spot the difference? That single comma after the last rule hash. That will stop IE7 from processing Javascript and result in your other events not getting fired.