function validateForm() {

	var name = trim(document.getElementById("name").value);
	var email = trim(document.getElementById("email").value);
	var telephone = trim(document.getElementById("telephone").value);
	var address = trim(document.getElementById("address").value);
	
	if (name == "") {
		alert("Please enter your name.");
		return(false);
	}
	
	if (email == "" && telephone=="") {
		alert("Please enter your email address or your telephone number.");
		return(false);
	}

	if (!validateEmail(email,true,true)) {
		return(false);
	}
	
	
	if (address == "") {
		alert("Please enter your address.");
		return(false);
	}
	
	
	return(true);
}