function validate_required(field) {
	with (field){
		if (value==null||value=="") {
			return false;
		}
		else {
			return true;
		}
	}
}

function validate_form(thisform) {
	with (thisform) {
		if (validate_required(parentname)==false) {
			alert("\"Parent Name\" must be filled out.");
			parentname.focus();
			return false;
		}
		else if (validate_required(email)==false) {
			alert("\"Email\" must be filled out.");
			email.focus();
			return false;
		}
		else if (validate_required(age)==false) {
			alert("\"Student Age\" must be filled out.");
			age.focus();
			return false;
		}
	}
}