function emailCheck (emailStr) {
	if (emailStr==null||emailStr=="") {
		alert("Please enter an e-mail address.");
		return false;
	}
	emailStr = emailStr.toLowerCase();
	var checkTLD=1;
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
	var emailPat=/^(.+)@(.+)$/;
	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 +")*$");
	var matchArray=emailStr.match(emailPat);
	if (matchArray==null) {
		alert("Your e-mail address seems incorrect (check @ and .'s)");
		return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];
	for (i=0; i<user.length; i++) {
		if (user.charCodeAt(i)>127) {
			alert("Ths e-mail username contains invalid characters.");
			return false;
		}
	}
	for (i=0; i<domain.length; i++) {
		if (domain.charCodeAt(i)>127) {
			alert("Ths domain name contains invalid characters.");
			return false;
		}
	}
	if (user.match(userPat)==null) {
		alert("The e-mail username doesn't seem to be valid.");
		return false;
	}
	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) {
		for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
				alert("Destination IP address is invalid!");
				return false;
			}
		}
		return true;
	}
	var atomPat=new RegExp("^" + atom + "$");
	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("Please check the last part of your e-mail address.\n\nThe address 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;
}

function ckSignup(){
	if (document.r2rwire.fullname.value==null||document.r2rwire.fullname.value==""){
		alert("Please enter your Name.");
	}
	if (document.r2rwire.zip.value==null||document.r2rwire.zip.value==""){
		alert("Please enter your Zip Code.");
	}
	else if (document.r2rwire.thirteen.checked!=true){
		alert("You must check the box marked \n'Yes! I am thirteen years of age or older.' \nto sign up to the R2R Wire.");
	}
	else if (emailCheck(document.r2rwire.email.value)) {
		document.r2rwire.submit();
	}
}

function ckContact(){
	if (emailCheck(document.r2rcontact.email.value)) {
		document.r2rcontact.submit();
	}
}

var digits = "0123456789";
function isInteger(s){
	var i;
	for (i = 0; i < s.length; i++) {
		var c = s.charAt(i);
		if ((c < "0") || (c > "9")) return false;
    }
    return true;
}
function ckMobase(){
var no1=document.mobase.txtCellNumber1.value+""+document.mobase.txtCellNumber2.value+""+document.mobase.txtCellNumber3.value;
var no2=document.mobase.R1.value+""+document.mobase.R2.value+""+document.mobase.R3.value;
	if (isInteger(no1) && isInteger(no2)){
		if (no1!=no2){
			alert("The numbers you have entered don't match each other.");
		}
		else if (no1.length<10){
			alert("Please make sure you have entered all 10 digits of your phone number.");
		}
		else if (document.mobase.chkValid.checked!=true){
			alert("You must check the box marked \n'I agree to the terms & conditions for SMS/Text message usage' \nto sign up for R2R Updates.");
		}
		else document.mobase.submit();
	}
	else{
		alert("Please check that you have entered only numbers.");
	}
}