JS scrollbar

function runScroll() {
  scrollTo(document.querySelector("#store-menu-component"), 0, 600);
}

var scrollme;
scrollme = document.querySelector("#next");
scrollme.addEventListener("click",runScroll,false)

function scrollTo(element, to, duration) {
  if (duration <= 0)
  {
    return;
  }

  var difference = to - element.scrollTop;
  var perTick = difference / duration * 10;

  setTimeout(function() {
    element.scrollTop = element.scrollTop + perTick;
    if (element.scrollTop == to)
    {
        return;
    }

    scrollTo(element, to, duration - 10);
  }, 10);
}