// return isValidEmail()
function isValidEmail(blah) {
    testPat = /^['_a-z0-9-]+(\.['_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*\.(([a-z]{2,3})|(aero|coop|info|museum|name))$/;
    if (testPat.test(blah.toLowerCase())) {
        return true;
    } else {
        alert("Please enter a valid email address.");
        return false;
    }
}