// Email Labs quick subscribe.
function emailCheck (emailStr) {
    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("Email address seems incorrect (check @ and .'s)");
        return false;
    }

    var user=matchArray[1];
    var domain=matchArray[2];
    if (user.match(userPat)==null) {
        alert("The 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 domainArray=domain.match(domainPat);
    if (domainArray==null) {
        alert("The domain name doesn't seem to be valid.");
        return false;
    }

    var atomPat=new RegExp(atom,"g");
    var domArr=domain.match(atomPat);
    var len=domArr.length;
    if ((domArr[domArr.length-1] != "info") &&
        (domArr[domArr.length-1] != "name") &&
        (domArr[domArr.length-1] != "arpa") &&
        (domArr[domArr.length-1] != "coop") &&
        (domArr[domArr.length-1] != "aero")) {
            if (domArr[domArr.length-1].length<2 ||
                domArr[domArr.length-1].length>3) {
                    alert("The address must end in a three-letter domain, or two letter country.");
                    return false;
            }
    }

    if (len<2) {
       var errStr="This address is missing a hostname!";
       alert(errStr);
       return false;
    }

    return true;
}

function UPTvalidateform(thisform)
{
    if (emailCheck(thisform.email.value)) 
    {	
        if (document.getElementById('unsubscribe') 
            && !document.getElementById('unsubscribe').checked) {
        } else {
            
        }
        return false;
    }
    else
    {
        return true;
    }
}