function popUp(NextPage,width,height) {
	if (navigator.appVersion.indexOf("AOL")>0) {winName="A" + (Math.round(Math.random() * 1000))} else {winName="PopUp"}
	window.open(NextPage,winName,'toolbar=no,width=' + width + ',height=' + height + ',directories=no,status=no,scrollbars=yes,resizable=yes,menubar=no');
	}

function checkCCexpire(CCexpire) {
	var ccRE = /\d\d\/\d\d/;
	if (CCexpire=="") {alert("Please enter your credit card expiry date."); return false}
	if (ccRE.test(CCexpire)==false) {alert("Expiry date is not in correct format."); return false}
	}

function checkCCnum(CCnumber) {
	var ccRE, cardMath, doubled;
	ccRE = /\W/gi;
	CCnumber = CCnumber.replace(ccRE, "");
	if (isNaN(CCnumber)) {alert("Credit card number is not numeric."); return false}
	if (CCnumber.length!=16) {alert("Incorrect number of digits in credit card number."); return false}
	cardMath=0;
	for (i=CCnumber.length; i>0; i--) {
		if (i % 2 == 1) {
			doubled = "" + (parseInt(CCnumber.substring(i - 1, i)) * 2);
			if (doubled.length==2) {doubled = parseInt(doubled.substring(0,1)) + parseInt(doubled.substring(1,2))}
			cardMath += parseInt(doubled);
			}
		else {cardMath += parseInt(CCnumber.substring(i - 1, i))}
		}
	if (cardMath % 10 != 0) {alert("Credit card number is invalid."); return false}
	}

function emailCheck (emailStr) {
	emailStr = emailStr.toLowerCase(); // Validate email address
	var checkTLD=1; // Verify that the address ends in a two-letter country or well-known TLD.  1 means check it, 0 means don't.
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum|co|uk)$/; // Known TLDs that an e-mail address must end with.
	var emailPat=/^(.+)@(.+)$/;
	var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
	var validChars="\[^\\s" + specialChars + "\]";
	var quotedUser="(\"[^\"]*\")";
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
	var atom=validChars + '+';
	var word="(" + atom + "|" + quotedUser + ")";
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
	var matchArray=emailStr.match(emailPat);
	if (matchArray==null) {alert("The Email address you entered seems incorrect (check @ and .'s)"); return false}
	var user=matchArray[1];
	var domain=matchArray[2];
	for (i=0; i<user.length; i++) {if (user.charCodeAt(i)>127) {alert("The username you entered contains invalid characters. Please try again.");return false}}
	for (i=0; i<domain.length; i++) {if (domain.charCodeAt(i)>127) {alert("The domain name you entered contains invalid characters. Please try again.");return false}}
	if (user.match(userPat)==null) {alert("The username you entered doesn't seem to be valid.");return false}
	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) {for (var i=1;i<=4;i++) {if (IPArray[i]>255) {alert("Destination IP address is invalid!");return false}}return true}
	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;
	for (i=0;i<len;i++) {if (domArr[i].search(atomPat)==-1) {alert("The domain name does not seem to be valid.");return false}}
	if (checkTLD && domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat)==-1) {alert("The email address you enter must end in a well-known domain or two letter " + "country.");return false}
	if (len<2) {alert("This address is missing a hostname!");return false}
	return true;
	}