var STR_SBOX_CONF = {
    "container" : "str_sbox",
    "line_height" : 16,
    "options" : [],
    "callback" : str_set_mday
};

for (var i=1; i<35; i++) {
    STR_SBOX_CONF.options.push({
        "value" : i,
        "title" : i+"."
    });
}

STR_SBOX_CONF.options[0].selected = true;