function gotoTop(acceleration,stime) {

   acceleration = acceleration || 0.1;
   stime = stime || 10;
   var x1 = 0;
   var y1 = 0;
   var x2 = 0;
   var y2 = 0;
   var x3 = 0;
   var y3 = 0; 
   if (document.documentElement) {
       x1 = document.documentElement.scrollLeft || 0;
       y1 = document.documentElement.scrollTop || 0;
   }
   if (document.body) {
       x2 = document.body.scrollLeft || 0;
       y2 = document.body.scrollTop || 0;
   }
   var x3 = window.scrollX || 0;
   var y3 = window.scrollY || 0;
 
 
   var x = Math.max(x1, Math.max(x2, x3));

   var y = Math.max(y1, Math.max(y2, y3));
 

   var speeding = 1 + acceleration;
   window.scrollTo(Math.floor(x / speeding), Math.floor(y / speeding));
 
   if(x > 0 || y > 0) {
       var run = "gotoTop(" + acceleration + ", " + stime + ")";
       window.setTimeout(run, stime);
   }
}

function closeBox(event){
  $('.floating_ck').addClass('close_box');
  $('.open').addClass('open_box');
}
function openBox(event){
  $('.floating_ck').removeClass('close_box');
  $('.open').removeClass('open_box');
}