if (document.images) {

 	var objoff = new Image(115,50);
 	var resoff = new Image(91,50);
 	var stooff = new Image(71,50);
 	var gamoff = new Image(95,50);
 	 	
 	var objon = new Image(115,50);
 	var reson = new Image(91,50);
 	var stoon = new Image(71,50);
 	var gamon = new Image(95,50);
 	
 	var p = '../../images/nav/';
 	
 	objoff.src = p + 'l_obj2.gif';
 	resoff.src = p + 'tch_res.gif';
 	gamoff.src = p + 'games.gif';
 	stooff.src = p + 'story.gif';
 	
 	objon.src = p + 'l_obj2_hl.gif';
 	reson.src = p + 'tch_res_hl.gif'; 
 	gamon.src = p + 'games_hl.gif'; 
 	stoon.src = p + 'story_hl.gif';
 	
	function on(imgName) {
		if (document.images) { document[imgName].src = eval(imgName + 'on.src'); }
	}
	
	function off(imgName) {
		if (document.images) { document[imgName].src = eval(imgName + 'off.src'); }
	}
}