var base = (Prototype.Browser.IE ? 0 : 1);
var factor = (Prototype.Browser.IE ? 1 : 2);
var index = 0;
 
function Previous()
{
	if (index > 0)
	{
	  index--;
	  Effect.SlideLeft(display.childNodes[base + index*factor]);
	  UpdateControllers();
	}
}

function Next()
{
	if (base+index*factor < display.childNodes.length-factor)
	{
	  Effect.SlideRight(display.childNodes[base + index++*factor]); //Up
	  UpdateControllers();
	}
}

function UpdateControllers()
{
	for (i = 1; i < navigation.childNodes.length;i++)
	  navigation.childNodes[i].src = (i == index+1 ? '/images/sliderFilled.png' : '/images/sliderBlank.png');
  
}