1.     function jumpToDiv() {
           $( document ).ready(function() {
               $('html, body').animate({
                   scrollTop: $("#contact_div").offset().top
               }, 2000);
           });   
       }

So when I call this function, it scroll me to div "contact_div" ... this process takes 2second ..AND I can not stop this scrolling ... : it scrolling and when I move my mouse, I want to stop it

Hope you ubderstand me and thanks for good answers :-)