function emailCheck (emailStr) {

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 email 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 username in your email address contains invalid characters.");
return false;
   }
}
for (i=0; i<domain.length; i++) {
if (domain.charCodeAt(i)>127) {
alert("Ths domain name supplied in your email address contains invalid characters.");
return false;
   }
}

if (user.match(userPat)==null) {

alert("The username in your email address 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 supplied in your email 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 in your email address does not seem to be valid.");
return false;
   }
}

if (checkTLD && domArr[domArr.length-1].length!=2 && 
domArr[domArr.length-1].search(knownDomsPat)==-1) {
alert("Your email address must end in a well-known domain or two letter " + "country.");
return false;
}
if (len<2) {
alert("Your email address is missing a hostname.");
return false;
}
return true;
}

function checkSignInform() {
if (document.forms["signin"].action == "signin.util.post.asp") {
		if (document.forms["signin"].elements["mo_user_email"].value == "") {
			alert ("Please enter your Email address.");
			document.forms["signin"].elements["mo_user_email"].focus();
			return false;
		}
		if (document.forms["signin"].elements["mo_user_email"].value != '') {
			var ec = emailCheck(document.forms["signin"].elements["mo_user_email"].value) 
			if (ec == false) {
			document.forms["signin"].elements["mo_user_email"].focus();
			return false;
			}	
		}				
		if (document.forms["signin"].elements["mo_user_password"].value == "") {
			alert ("Please enter your Password.");
			document.forms["signin"].elements["mo_user_password"].focus();
			return false;
			}
// validate("signin","mo_user_ID_password");
// no longer in use. we accept chars and numerals
document.forms["signin"].elements["s"].value = "Logging on...";
document.forms["signin"].elements["s"].disabled = true;
}
}
function validate(frm,elem) {
	var str = document.forms[frm].elements[elem].value
	var valid = 1
	var AcceptChars = "0123456789()-+ "
	var i = 0
	if (str=="") {
		valid = 0
	}
	for (i=0;i<=str.length-1;i++) {
		if (AcceptChars.indexOf(str.charAt(i)) == -1) {
				tempstr = str.charAt(i);
				str = str.replace(tempstr,'');
				document.forms[frm].elements[elem].value = str
				valid = 0
		} 
	}
	return valid
}
function doregister() {
	document.forms["signin"].action = "register.asp";
	document.forms["signin"].submit();
}
function dopassword() {
	if (document.forms["signin"].elements["mo_user_email"].value == "") {
		alert ("Please enter your Email address.");
		document.forms["signin"].elements["mo_user_email"].focus();
		return;
		}
	else {
	document.forms["signin"].elements["fwd"].value = "signin.asp"
	document.forms["signin"].action = "password.util.post.asp"
	document.forms["signin"].submit()
	}
}