function validateform() {
	if (document.contact.name.value == "") {
		alert("You have forgotten to enter your name.");
		valid=false;
	} else if (document.contact.email.value == "") {
		alert("You have forgotten to enter your email address.");
		valid=false;
	} else if (document.contact.email.value.indexOf("@") == -1 ||  document.contact.email.value.indexOf(".") == -1) {
		alert("The email address you have entered is not valid.");
		valid=false;
	} else if (document.contact.message.value == "") {
		alert("You have forgotten to enter your message.");
		valid=false;
	} else {
		valid=true;
	}
	return valid;
}