@Kixo, @PetarT 
i already checked.
with tooltips function, you have to bootstrap.js and bootstrap.css
but redcore doesn't allow bootrap.css working on backed-site. it will make the style of tooltip fail.
if i allow bootstrap css working. it will make all backed-site wrong style. :)
if you remove all bootstrap, you will use tooltips of mootools :|, very bug is happen, so i don't know that the way is the best.
can anyone give me some advice?