function validateZIP(field) {
    var valid = "0123456789-";
    var hyphencount = 0;
    if (field.length!=5 && field.length!=10) {
        alert("Please enter a street address and 5 digit or 5 digit+4 ZIP code.");
        return false;
    }
    for (var i=0; i < field.length; i++) {
        temp = "" + field.substring(i, i+1);
        if (temp == "-") { 
            hyphencount++;
        }
        if (valid.indexOf(temp) == "-1") {
            alert("Invalid characters in your ZIP code.  Please try again.");
        return false;
        }
        if ((hyphencount > 1) || ((field.length==10) && ""+field.charAt(5)!="-")) {
            alert("The hyphen character should be used with a properly formatted 5 digit+four ZIP code, like '12345-6789'.   Please try again.");
            return false;
        }
    }
    return true;
}
function validateFAD(field1, field2) {
    if (field1 == "Enter Your Street Address" || field1.length < 5) {
        alert("Please enter a street address and 5 digit or 5 digit+4 ZIP code.");
        return false;
    } else {
        return validateZIP(field2);
    }
}