jQuery(document).ready( function() {
	jQuery('#form').validate( {
		submitHandler : function(form) {
			displayDialog();
		},

		rules : {
			NAME : "required",
			SURNAME : "required",
			EMAIL : {
				required : true,
				email : true
			},
			MESSAGE : "required"
		},
		
		messages : {
			NAME : MailJsName,
			SURNAME : MailJsSurName,
			EMAIL : {
				required : MailJsEmail,
				email : MailJsEmailCheck
			},
			MESSAGE : MailJsMessage
		}
	});
});



<!--
function VNUM(client_id,fieldname,required) {

field = document.all ? document.all[client_id] : document.getElementById(client_id);

var valid = "0123456789."
var ok = "yes";
var temp;
for (var i=0; i<field.value.length; i++) {
temp = "" + field.value.substring(i, i+1);
if (valid.indexOf(temp) == "-1" || valid.value == "" ) ok = "no";
}
var intRequired = 0 ;
var strReplacement = "0";

if ( required == false ) { 
	intRequired = -1 ;
	strReplacement = "";
}

if ((ok == "no") || (field.value.length == intRequired )) {
alert("Warning ! \n" + fieldname + " - please enter only numbers..");


field.value = strReplacement;
field.focus();
field.select();

return false;
   }
return true;
}

function VTEXT(client_id,fieldname) {

    field = document.all ? document.all[client_id] : document.getElementById(client_id);

	if (( field.value=="" ) || ( field.value=="  " )  ||( field.value=="   " )  ||( field.value=="    " )  ||( field.value=="     " )) {
	alert("Warning !\n" + fieldname + " must be filled. ");
	field.focus();
	field.select();
	return false;
	   }
	return true;
}

function VSELECT(client_id,fieldname) {

    field = document.all ? document.all[client_id] : document.getElementById(client_id);

	if (( field.value=="" ) ) {
	alert("Please select " + fieldname + " first. ");
	field.focus();
	return false;
	   }
	return true;
}


function isEmail(client_id){

    field = document.all ? document.all[client_id] : document.getElementById(client_id);
    
	emailAddress=field.value;
	if (field.value == "") {
	alert("\n  Please enter e-mail address.");
	field.focus();
	return false; 
	}
	if (field.value.indexOf ('@',0) == -1 || 
	field.value.indexOf ('.',0) == -1)
	{
	alert(" Please enter a valid e-mail address.");
	field.select();
	field.focus();
	return false;
	}
	return true;
	}

function getObject(objectID){
      return document.all ? document.all[objectID] : document.getElementById(objectID);         
 }