$(document).ready(function($){
	$('#contactform').submit(function(){
		var why = "";
			why += isEmpty($('#fullname').val(), "Name field");
    		why += checkEmail($('#email').val());
    		why += isEmpty($('#company').val(), "Company Name field");
    		why += isEmpty($('#message').val(), "Message field");
    		
		   	if (why != "") {
     		  alert(why);
     			return false;
    		} 
	});
});