how to remove previous class and add new class in jquery?

Question

I am storing my primary key as Classname

everytime this function called i will have new primary key key,

 function OnBtnShowPopupClick(elementID) {
                ASPxClientPopupControl1.ShowAtElementByID(elementID);
                $("#hiddenTag").addClass(elementID);
            }

what i want is to remove previous classname and add new className

how?

Answer 1

Have you looked at removeClass

i.e

$("#hiddenTag").removeClass('someclass').addClass(elementID);

And if you don't know the class name:

$("#hiddenTag").removeAttr('class').addClass(elementID);