gistfile1.js

(function($) {
	$.extend($.fn, {
		validate: function(options) {
			var form = this;
			
			this.submit(function(event) {
				form.find('label.error').filter('[generated=true]').empty()
				
				if ((req_fields = form.find('.required[value=""]')).length > 0) {
					req_fields.after('<label class="error" generated="true">This field is required</label>')
					req_fields[0].focus()
					return false;
				} else {
					return true
				}
			})
		}
	})
})(jQuery);