var slideshowRules = {
  '#thumbsContainer' : function(el) {
  		el.onmouseover = function(e){
        thumbScrollerRunning = true;
        slideshowEngine.startThumbScroller();    
      },
  		el.onmouseout = function(e){
       thumbScrollerRunning = false;
     },
     el.onmousemove = function(e){
        var leftMost = Position.cumulativeOffset($('thumbsContainer'))[0];
        scrollSpeed = Math.floor((325 - (getPointerX(e) - leftMost)) /40);
     }
  }
}