Is there a way to make horizontal scrolling smoother

Question

This fiddle is almost what I'm looking for, I got it from MDN. The only thing missing is that I want to make it smoother. Is there a way to do that without using jQuery or any other plugins?

Fiddle

        var button = document.getElementById('slide');
        button.onclick = function () {
            document.getElementById('container').scrollLeft += 100;
        };

        var back = document.getElementById('slideBack');
        back.onclick = function () {
            document.getElementById('container').scrollLeft -= 100;
        };

Answer 1

This could probably be optimised a fair bit, but here is a basic example of how you could do it using setInterval and clearInterval

Fiddle

Update

Here is another example of it wrapped into a function instead, bit easier to tweak the speed etc.

Fiddle

Answer 2

you can do it vertically with jquery although i'm sure it can be adjusted to be done horizontally. The demo is here

There's a javascript smoothscroll on github too added by cfernandi

Also ccheck out iscroll.js

$(function() {
  $('a[href*=#]:not([href=#])').click(function() {
    if (location.pathname.replace(/^\//,'') == this.pathname.replace(/^\//,'') && location.hostname == this.hostname) {
      var target = $(this.hash);
      target = target.length ? target : $('[name=' + this.hash.slice(1) +']');
      if (target.length) {
        $('html,body').animate({
          scrollTop: target.offset().top
        }, 1000);
        return false;
      }
    }
  });
});