function in_array (needle, haystack, argStrict) {
    var key = '', strict = !!argStrict;

    if (strict) {
        for (key in haystack) {
            if (haystack[key] === needle)
                return true;            
        }
    } else {
        for (key in haystack) {
            if (haystack[key] == needle)
                return true;
        }
    }

    return false;
}