browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);

if (browserName == "Netscape" && browserVer <= 4 || browserName == "Microsoft Internet Explorer" && browserVer <= 4) version = "v4";
        else version = "v3";
             
if (version == "v4") {
	img0out = new Image();
	img0out.src = "/images/nav_top_mpa_out.gif";
	img1out = new Image();
	img1out.src = "/images/nav_top_anj_out.gif";
	img2out = new Image();
	img2out.src = "/images/nav_top_snj_out.gif";
   img3out = new Image();
	img3out.src = "/images/nav_top_gl_out.gif";
   img4out = new Image();
	img4out.src = "/images/nav_top_olp_out.gif";
	
	img0over = new Image();
	img0over.src = "/images/nav_top_mpa_over.gif";
	img1over = new Image();
	img1over.src = "/images/nav_top_anj_over.gif";
	img2over = new Image();
	img2over.src = "/images/nav_top_snj_over.gif";
   img3over = new Image();
	img3over.src = "/images/nav_top_gl_over.gif";
   img4over = new Image();
	img4over.src = "/images/nav_top_olp_over.gif";
}

function img_act(imgName) {
	if (version == "v4") {
		imgOn = eval(imgName + "over.src");
        document[imgName].src = imgOn;
     }
}

function img_inact(imgName) {
	if (version == "v4") {
		imgOff = eval(imgName + "out.src");
        document[imgName].src = imgOff;
    }
}