$(document).ready(function(){
    $("#contact_form").validate({    
    invalidHandler: function(form, validator) {
      var errors = validator.numberOfInvalids();
      if (errors) {
        var message = errors == 1
          ? 'There is one error. It has been highlighted.'
          : 'There are ' + errors + ' errors. They have been highlighted.';
        alert(message);
      } 
    }
    ,errorContainer: "#errorbox",
    errorLabelContainer: "#errorbox ul",
    wrapper: "li",
    rules: 
	{
		name: "required"
		,email:
		{
			required: true
			,email: true
		}
		,subject: "required"
    }
	,messages: 
	{
		name: "Please enter your name."
		,email:
		{
			required: "Please enter your email address."
			,email: "Please enter a valid email address in the format of name@domain.com."
		}
		,subject: "Please enter a subject."
    }
        
    });
});