function checkform() {
	var lb = document.getElementById("linkbackurl");
	if (lb.value =="" || lb.value == "http://") {
		alert("The Link Back URL field must be provided.");
		return false;
	}
	var pu = document.getElementById("padurl");
	if (pu.value =="" || pu.value == "http://") {
		alert("The PAD URL field must be provided.");
		return false;
	}
	if (lb.value == pu.value) {
		alert("The Link Back URL must be a web page and can not be the same as the PAD URL.");
		return false;
	}
	return true;
}