var button = document.getElementById('slide5');
button.onclick = function () {
    var container = document.getElementById('container5');
    sideScroll(container,'right',25,170,5);};
var back = document.getElementById('slideBack5');
back.onclick = function () {
    var container = document.getElementById('container5');
    sideScroll(container,'left',25,170,5);};
function sideScroll(element,direction,speed,distance,step){
  scrollAmount = 0;
 var slideTimer = setInterval(function(){
  if(direction == 'left'){
  element.scrollLeft -= step;
  } else {
 element.scrollLeft += step;}
 scrollAmount += step;
 if(scrollAmount >= distance){
 window.clearInterval(slideTimer);}
 }, speed);}