[jQuery] Why doesn't the following code work?

[Phper]

$(document).ready(function() {
      $("#form1").validate({
        rules: {
          name: "required",// simple rule, converted to
{required:true}
        title,content, evaluation: {
                required: true
        }
             },
        messages: {
                  comment: "Please enter a comment."
        }
              });
            });