jquery to javascript

jquery to javascript

is this possible if someone please help me to convert this jquery code to javascript 
  1. $(document).ready(function(){ $('.clickButtons').mouseover(function() { $(this).siblings().toggleClass("vis"); $("div.textC").attr('style','visibility:hidden;') var index = $("li").index(this); $("div.textC").eq(index).attr('style','visibility:visible;') }); $('.clickButtons').mouseleave(function() { $(this).siblings().toggleClass("vis"); }); });