function MakeGif(img) {
	var	g=new Image();
	g.src='/gif/'+img+'.gif';
	return g;
}
FCls=MakeGif('folder');
FOpn=MakeGif('fldropen');
var	prev='F0';
function MakeOpen(which) {
	document[prev].src=FCls.src;
	document[which].src=FOpn.src;
	prev=which;
}