<script src="/scrolltop/scrolltop.js" type="text/javascript"></script>  

<script type="text/javascript">          
(function () {          
          function addEvent( object, type, handler ) {          
          if ( !object.events ) object.events = {};          
          if ( !object.events[type] ) object.events[type] = [];          
          function handle( e ) {          
          e = e || window.event;          
          if ( !e.pageX || !e.pageY ) {          
          var html = document.documentElement, body = document.body;          
          e.pageX = event.clientX + (html && html.scrollLeft || body && body.scrollLeft || 0) - (html.clientLeft || 0);          
          e.pageY = event.clientY + (html && html.scrollTop || body && body.scrollTop || 0) - (html.clientTop || 0);          
          }          
          handler.call( object, e );          
          }          
          object.events[type].push( [ handler, handle ] );          
          if ( object.addEventListener ) {          
          object.addEventListener( type, handle, false );          
          } else {          
          object.attachEvent( 'on' + type, handle );          
          }          
}          
          function removeEvent( object, type, handler ) {          
          var events = object.events[type];          
          for ( var i = 0; i < events.length; i++ ) {          
          if ( handler == events[i][0] || !handler ) {          
          if ( object.removeEventListener ) {          
          object.removeEventListener( type, events[i][1], false );          
          } else {          
          object.detachEvent( 'on' + type, events[i][1] );          
          }          
          }          
          }          
}          
})();          
</script>