function validate(f) {
	if (isBlank(f.forename.value)) {
		alert("You must enter a forename");
		f.forename.focus();
		return false
	}
	if (isBlank(f.surname.value)) {
		alert("You must enter a surname");
		f.surname.focus();
		return false;
	}
	if (isBlank(f.email.value)) {
		alert("You must enter a email");
		f.email.focus();
		return false;
	}
	if (!isEmail(f.email.value)) {
		alert("You have supplied an invalid email address!");
		f.email.focus();
		return false;
	}
	if (isBlank(f.message.value)) {
		alert("You must enter an enquiry");
		f.email.focus();
		return false;
	}
	if (f.message.value=='Type your enquiry here...') {
		alert("You must enter an enquiry");
		f.email.focus();
		return false;
	}
	
	return true
}