$(function(){
   var w_h=$(window).height(); 
   $(window).scroll(function(){
     
     var w_s=($(window).scrollTop()-w_h*0.6)*0.35;
       var w_a="translateY(-"+w_s+"px)";
       $("#w_grid-1558763681070").stop().css("transform",w_a);   
   });
  
  });