function roll(img,state,layername){
	if (document.layers){
		document.layers[layername].document.images[img].src = eval(img + "_" + state + ".src");
	}
	else {
		document[img].src = eval(img + "_" + state + ".src");
	}
}

function rollflat(img,state){
	document[img].src = eval(img + "_" + state + ".src");
	
}