var navifolder = "../images.three.state/";
    if (toplevel == 1) {    navifolder = "images.three.state/";    }
    var trilithonbuttonslo = new Array(trilithonimages.length);
    var trilithonbuttonshi = new Array(trilithonimages.length);
    var trilithonbuttonson = new Array(trilithonimages.length);
		
	for (i = 0;  i < trilithonimages.length;  i++) {
		trilithonbuttonslo[trilithonimages[i]] = new Image();
		trilithonbuttonslo[trilithonimages[i]].src = navifolder + trilithonimages[i] + "lo.png";
		trilithonbuttonshi[trilithonimages[i]] = new Image();
		trilithonbuttonshi[trilithonimages[i]].src = navifolder + trilithonimages[i] + "hi.png";
		trilithonbuttonson[trilithonimages[i]] = new Image();
		trilithonbuttonson[trilithonimages[i]].src = navifolder + trilithonimages[i] + "on.png";
	}
    
    function trilithonhi(name) {
        document.images[name].src = trilithonbuttonshi[name].src;
        return true;
    }
    function trilithonlo(name) {
        document.images[name].src = trilithonbuttonslo[name].src;
        return true;
    }