function setFocus( what, where ) {
	if(where==null)
		where=what;
	if(parseInt(navigator.appVersion) >= 4 ) // no PNG images until Netscape/IE 4
	   document [where].src=what+"-h.png";
	  //alert(navigator.appVersion);
	where = null;
}

function clearFocus( what, where ) {
	if(where==null)
		where=what;
	if(parseInt(navigator.appVersion) >= 4 ) // no PNG images until Netscape/IE 4
	   document [where].src=what+".png";
	where = null;
}