function Image_collection() {
	categories=new Array("home","profile","areas","bio","recognition","contact");
	for (a=0; a < categories.length; a++) {
		i=categories[a];
		this [i]=new Image(367,37);
		this [i + '_g']=new Image(367,37);
		this [i].src="images/toc4/"+i+".gif";
		this [i + '_g'].src="images/toc4/"+i+"-g.gif";
	}
}
imgs=new Image_collection();

function setFocus( what, where ) {
	if(where==null)
		where='toc'+what;
	if(navigator.appVersion.substring(0,1)!="2") // no images in Netscape 2, IE 3
		document [where].src=imgs [what+'_g'].src;
	where = null;
}

function clearFocus( what, where ) {
	if(where==null)
		where='toc'+what;
	if(navigator.appVersion.substring(0,1)!="2") // no images in Netscape 2, IE 3
		document [where].src=imgs [what].src;
	where = null;
}