function ValidatePhone(elem) {
	var pn = elem.value;
	if (pn == "") return;
	pn = pn.replace(/\D/g,"");

	if (pn.length == 7)
		elem.value = pn.replace(/(\d{3})(\d{4})/,"$1-$2");
	
		
	else if (pn.length == 10)
		elem.value = pn.replace(/(\d{3})(\d{3})(\d{4})/,"($1) $2-$3");
		
	else {
		alert('The '+elem.name+' must be a 10 digit phone number');
		elem.style.background = "yellow";
		elem.focus();
		return false;
		}
	}