// JavaScript Document
function checkForm() {
	var email = document.contactForm.email;
	var message = document.contactForm.message.value;
	var subject = document.contactForm.subject.value;
	var name = document.contactForm.name.value;	
	var err = "";	
	var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	
	if (!filter.test(email.value)) {
		err += "\nPlease provide a valid email address.";
	}
	
	if(name == "") {
		err += "\nPlease enter your name.";		
	}
	
	if(subject == "") {
		err += "\nPlease provide a subject for your message.";		
	}
	
	if(message == "") {
		err += "\nPlease enter a value for your message.";		
	}
	
	if(err != "") {	
		alert(err);
		return false;
	}
	
	return true;
		
}