option[value=""]:after, option[value="?"]:after {
content: 'dummy';
color: transparent;
}
option[value=""]:not(:last-child),option[value="?"]:not(:last-child) {
display: none;
}
var callback=function() {
known_components[component_id](data);
}
if (!known_components[component_id]) {
load_component_js_from_server(component_id, callback)
} else {
callback();
}