function validateForm() {
			if (document.form_data.name.value == "") {
				alert("Please enter your name");
				document.form_data.name.focus();
				return false;
			} 
			else if (! isValidEmail(document.form_data.email.value)) {
	        	alert("Please enter a valid email address");
	        	document.form_data.name.focus();
				return false;
		    	}
			else if (document.form_data.comment_type.selectedIndex == "") {
				alert("Please select a comment type");
				document.form_data.comment_type.focus();
				return false;
			} 
			else if (document.form_data.message.value == "") {
				alert("Please enter a comment / question");
				document.form_data.message.focus();
				return false;
			}
			return true;
		}
		
		function focusForm() {
			document.form_data.name.focus();
		}