function documentLoad() {
    $(document).ready(function () {
        window.setInterval(zipCodeTimer, 100);
    });
}

var currZipCode = "";
documentLoad();

function zipCodeTimer() {
    try {
        if (($('input[AutoPostBackZip="True"]').val().length == 5 && currZipCode != $('input[AutoPostBackZip="True"]').val())
            || ($('input[AutoPostBackZip="True"]').val().length == 0 && currZipCode.length > 0)
            ) {
            currZipCode = $('input[AutoPostBackZip="True"]').val();
            $('input[AutoPostBackZip="True"]').blur();
            window.setInterval(zipCodeTimer, 100);
        }
    }
    catch (Error) {

    }

}