1 function getScrollOffset()

     2 {

     3   var position;

     4   if (self.pageYOffset)

     5   {

     6     position = self.pageYOffset;

     7   }

     8   else if (document.documentElement && document.documentElement.scrollTop)

     9   {

    10     position = document.documentElement.scrollTop;

    11   }

    12   else if (document.body)

    13   {

    14     position = document.body.scrollTop;

    15   }

    16   return position;

    17 }

    18 

    19 var fix_scroll = function()

    20 {

    21   var div = document.getElementById('playbar');

    22   div.style.top = ( String(getScrollOffset()) ) + 'px';

    23 }

    24 

    25 window.onscroll = fix_scroll;

    26