function validate(){
	var error_message = "";	
	if($('first_name').value == ""){
		error_message += "\nYou must enter a first name.";
	}
	
	if($('email_address').value == ""){
		error_message += "\nYou must enter your email address.";
	}
	
	if($('comments').value == ""){
		error_message += "\nYou must enter comments.";
	}
	
	if(error_message != ""){
		alert(error_message);
		return false;
	}else{
		return true;
	}
}