function imgRolloverOn()
	{
		var img = null;
		if (document.layers)
			img = eval(this.nest + "document.images['" + this.imgName + "']");
		else
			img = document.images[this.imgName];
		this.imgSave = img.src;
		img.src = this.imgOn.src;
	}
	
	function imgRolloverOff()
	{
		var img = null;
		if (document.layers)
			img = eval(this.nest + "document.images['" + this.imgName + "']");
		else
			img = document.images[this.imgName];
		img.src = this.imgSave;
	}
	
	function Rollover(imgName, on, nest)
	{
		this.nest = nest;
		this.imgName = imgName;
		this.imgOn = new Image();
		this.imgOn.src = on;
		this.on = imgRolloverOn;
		this.off = imgRolloverOff;
		
		return this;
	}