Just started jquery and am stuck.

Just started jquery and am stuck.

I am using an extended addclass and removeclass that basically just adds a animation onto it.

I took this from the script:

addClass: function(classNames, speed, easing, callback) 
removeClass: function(classNames,speed,easing,callback) 

My issue is that I need to run the following code, but if a user clicks a item then another before the last one finished it causes two items to change classes.

I tried playing around with the callback, but I can't get it to work.  This is what I need to do though.

$(document).ready(function(){ 
 $(".scrollable1 .items div").click(function () {
      $(".scrollable1 .items div").removeClass(".scrollable .items div selected", 0);
      $(this).addClass(".scrollable .items div selected", 1000);
    });
}); 


Please help, as I am stuck!!

Thanks a lot