var Scroll = Class.create();

	Scroll.prototype = {
		initialize: function(offsetScroll,container,inspectWindow,inspectWindowScrollers) {
		    this.offsetScroll            = offsetScroll;
		    this.container               = $(container);
		    this.inspectWindow           = $(inspectWindow);                 
		    this.inspectWindowScrollers  = $(inspectWindowScrollers);
   			this.posTop                  = 0;
   			this.toggleScrollbar();
		},
		toggleScrollbar:function()
		{
		  if(this.inspectWindow.getHeight() > this.container.getHeight())
		  {
		    this.inspectWindowScrollers.show()
		  }
		  else 
		  {
		    this.inspectWindowScrollers.hide();
		    this.posTop = 0;
		    this.inspectWindow.style.top = this.posTop + 'px';
		  }
		},
		moveScrolUp:function()
		{
			if((this.container.getHeight() - this.posTop) < this.inspectWindow.scrollHeight){
				this.posTop = this.posTop - this.offsetScroll;
				this.inspectWindow.style.top = this.posTop + 'px';
			}
		},
		moveScrolDown:function()
		{
			if(this.posTop!=0){
				this.posTop = this.posTop + this.offsetScroll;
				this.inspectWindow.style.top = this.posTop + 'px';
			}	
		}
		
	}	

	Scroll.showScrollbar = function(div) 
	{
		try{
		    $(div).select('div.hasScrollScrollableArea').each(function(s) {   
		    	var objName= 'scroll'+ s.id;
				var f = objName + '.toggleScrollbar()';
				eval(f);
				});
		}
		catch(e){
		  
		}
	}