function unv(imgname, imgof) {
	if (navigator.appVersion > "3") {
		imgnum = new Image();
		if( imgof == 0 ){
			imgnum.src = "../img/nv/nv"+imgname+".jpg";
		}else if( imgof == 1 ){
			imgnum.src = "../img/nv/nv"+imgname+"_on.jpg";
		}else if( imgof == 2 ){
			imgnum.src = "../img/nv/nv"+imgname+".gif";
		}else if( imgof == 3 ){
			imgnum.src = "../img/nv/nv"+imgname+"_on.gif";
		}
		document.images['nv'+imgname].src = imgnum.src;
	}
}

function snv(imgname, imgof) {
	if (navigator.appVersion > "3") {
		imgnum = new Image();
		if( imgof == 0 ){
			imgnum.src = "img/snv"+imgname+".jpg";
		}else if( imgof == 1 ){
			imgnum.src = "img/snv"+imgname+"_on.jpg";
		}else if( imgof == 2 ){
			imgnum.src = "img/snv"+imgname+".gif";
		}else if( imgof == 3 ){
			imgnum.src = "img/snv"+imgname+"_on.gif";
		}
		document.images['snv'+imgname].src = imgnum.src;
	}
}

function ich(imgname, imgof) {
	if (navigator.appVersion > "3") {
		imgnum = new Image();
		if( imgof == 0 ){
			imgnum.src = "img/"+imgname+".jpg";
		}else if( imgof == 1 ){
			imgnum.src = "img/"+imgname+"_on.jpg";
		}else if( imgof == 2 ){
			imgnum.src = "img/"+imgname+".gif";
		}else if( imgof == 3 ){
			imgnum.src = "img/"+imgname+"_on.gif";
		}
		document.images[imgname].src = imgnum.src;
	}
}

function chg(id, clsof) {
	if (navigator.appVersion > "3") {
		cls = document.getElementById(id).className; /* now cls */
		if( clsof == 0 ){ /* mouse off - now cls - _on*/
			onid = cls.indexOf("_on", 0);
			cls = cls.substr(0, onid);
		}else if( clsof == 1 ){ /* mouse on - now cls + _on */
			cls = cls+"_on";
		}
		document.getElementById(id).className = cls;
	}
}