function physicianLocator(uri, specialtyKey, zip) {
    if((specialtyKey.length == 0) && ((zip.length == 0) || (zip == 'Enter your zip code'))) {
        return;
    }
    if (zip == 'Enter your zip code') zip = '';
    window.location = uri + '?specialtyKey=' + specialtyKey + '&zip=' + zip;
}