function AI_AddImages(ID, ImageOn, ImageOff)
{
//	if (! AI_ImagesOn[ID])
	AI_ImagesOn[ID] = new Image();
	AI_ImagesOn[ID].src = ImageOn;
//	if (! AI_ImagesOff[ID])
	AI_ImagesOff[ID] = new Image();
	AI_ImagesOff[ID].src = ImageOff;
}

function AI_ImageOn(ID)
{
	document["img"+ID].src = AI_ImagesOn[ID].src;
}

function AI_ImageOff(ID)
{
	document["img"+ID].src = AI_ImagesOff[ID].src;
}

function AI_NamedImageOn(name, ID)
{
	document[name].src = AI_ImagesOn[ID].src;
}

function AI_NamedImageOff(name, ID)
{
	document[name].src = AI_ImagesOff[ID].src;
}

var AI_ImagesOn = new Array();
var AI_ImagesOff = new Array();

// funkce pro flip
function flip(idf)
{
	var ele = document.getElementById(idf);
	if (ele.className == "hidden")
	    ele.className = "shown";
	else
	    ele.className = "hidden";
}