function isEmpty(element) {
	if (element.value != "") {
		return false;
	} else {
		return true;
	}
}

function checkform(form) {

	error = "";
	if ((isEmpty(form.fullname))) {
		error += "Full Name is empty\n";
	}	

	if ((isEmpty(form.email))) {
		error += "E-mail is empty\n";
	}

	if((isEmpty(form.phone))) {
		error += "Phone Number is empty";
	}

	if (error == "") {
		document.requestForm.submit();
	} else {
		alert(error);
	}
	return false;
}