jQuery.validator.addMethod("lettersonly", function(value, element) {
return this.optional(element) || /^[a-z ]+$/i.test(value);
});

$(function(){
$("#contactForm").validate({

rules: {
   name: {
	required: true,
	lettersonly: true,
	maxlength: 40
   },
   email: {
	email: true,
	required: true,
	maxlength: 40
   },
   phone: {
      required: true,
	  maxlength:40
   },
   comments: {
	maxlength:500,
	required: true
   }
   },
messages: {
	name: {
		required: "! Please enter your name.",
		lettersonly: "! Letters only please."
	},
	email: {
		email: "! Please enter a valid email address.",
		required: "! Please enter a contact email address."
	},
	phone: {
		required: "! Please enter a phine number."
	},
	comments: {
		maxlength: "! Message is limited to 500 characters",
		required: "! Please enter a message."
	}
	}
});
});