Javascript/scrollLeft()

sample1

sample1p

sample1code

var sample1BtnRight = document.getElementById('sample1BtnRight');
var sample1BtnLeft = document.getElementById("sample1BtnLeft");
sample1BtnRight.onclick = function () {
  document.getElementById('sample1Div').scrollLeft += 100;
};
sample1BtnLeft.onclick = function () {
  document.getElementById('sample1Div').scrollLeft -= 100;
};

sample2

sample2p

sample2code

function s2Func(){
  document.getElementById('s2Div').scrollLeft += 10;
  setTimeout(function(){
  	s2Func()
  }, 100);
}
s2Div.addEventListener("click", s2Func);