function isEmail(x) {
    if ((x == "") || (x.indexOf(" ") > -1) || (x.length < 6))
        return false;

    var goodChars = /^([a-zA-Z0-9\-\_]+\.)*[a-zA-Z0-9\-\_]+@(([a-zA-Z0-9]+\-)*[a-zA-Z0-9]+\.)+[a-zA-Z]{2,6}$/;
    var testVar = goodChars.test(x)
    return testVar;
}

function isZip(x) {
    var goodChars = /^\d{5}(-\d{4})?$/;
    var testVar = goodChars.test(x)
    return testVar;
}

function isPhone(x) {
    x = x.replace(/\s/g, "");
    var goodChars = /^[- 0-9().]{10,20}$/;
    var testVar = goodChars.test(x);
    return testVar;
}