function ZoomManager()
{
}

ZoomManager.prototype.buttons = new Array();

ZoomManager.prototype.step = function()
{
	var running = false;
	for (var zm = 0; zm < this.buttons.length; zm ++)
	{
		this.buttons[zm].step();
		if (this.buttons[zm].running == true)
			running = true;
	}

	return running;
}