d = document;
function new_win(theURL,winName,features){
	newwin = window.open(theURL,winName,features);
	newwin.focus();
}
function bild(){if(d.images){for(i=0;i<bild.arguments.length-1;i+=2){d.images[bild.arguments[i]].src = bild.arguments[i+1];}}}

function setnav(id, img, status){
	if (status == "on"){
		for (var i=0; i<cat.length; i++) {
			if(d.getElementById('cont'+cat[i])) d.getElementById('cont'+cat[i]).style.visibility = "hidden";
		}
		if (act_cat != id) bild('mainnav'+act_cat, act_imgoff);
		bild('mainnav'+id, img);
		if(d.getElementById('cont'+id)) d.getElementById('cont'+id).style.visibility = "visible";

	}
		
	if (status == "off" && act_cat != id){
		if(d.getElementById('cont'+id)) d.getElementById('cont'+id).style.visibility = "hidden";
		bild('mainnav'+id, img);

		bild('mainnav'+act_cat, act_imgon);
		if(d.getElementById('cont'+act_cat)) d.getElementById('cont'+act_cat).style.visibility = "visible";
	}
}