$(document).ready(function(){ 

        $("form").submit(function(event) {  
		  
		 var name = document.forms[0].elements[0].value;
		 var email = document.forms[0].elements[1].value; 
		 var subject = document.forms[0].elements[2].value;
         var message = document.forms[0].elements[3].value;  
 
			if (name == "") {  
               alert("You can not send a blank email"); 
			   document.forms[0].reset();
			   return false;
			}
			
			if (email == "") {  
               alert("You can not send a blank email"); 
			   document.forms[0].reset();
			   return false;
			} 

            var dataString = '&name=' + name + '&email=' + email + '&subject=' + subject + '&message=' + message; 
			
            $.ajax({
              type: "POST",
              url: "contact.php",
              data: dataString,
              success: function() {
				$('.LV_validation_message').remove();
			    document.forms[0].reset();
                alert("Thank You, your message has been sent."); 
              } 
            });
            return false;  
        }); 
});