Thank you for your answer. I understand that, but I don´t need to remove it, if you change the false to true (this.multiple = multiple || true;) , it will do the stuff, but like you said, it will remove the effect on each other.
“maybe the best thing to do is find another menu function that does the work for you.”
I see, and I can do it, but I like this one :)
Also I´will check another.
thank you again