page_preloader.phtml

<script type="text/javascript">

   window.onload = function() {


       function fadeOut(el){

           el.style.opacity = 1;


           var last;

           var tick = function() {

               el.style.opacity = +el.style.opacity - (new Date() - last) / 600;

               last = +new Date();


               if (+el.style.opacity > 0) {

                   (window.requestAnimationFrame && requestAnimationFrame(tick)) || setTimeout(tick, 100);

               } else{

                   el.style.display = "none";

               }

           };

           tick();

       }


       var pagePreloaderId = document.getElementById("page-preloader");

       setTimeout(

           function () {

               fadeOut(pagePreloaderId)

           }, 1000);

   };

</script>