browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
if (browserName == "Netscape" && browserVer >= 3) browserVer = "1";
else if (browserName == "Microsoft Internet Explorer" && browserVer == 4) browserVer = "1";
else browserVer = "2";

//preload imagems
if (browserVer == 1) {
prog1 = new Image(140,16);
prog1.src = "/image/layout/prog1.gif";
prog1on = new Image(140,16);
prog1on.src = "/image/layout/prog1on.gif";
prog2 = new Image(140,16);
prog2.src = "/image/layout/prog2.gif";
prog2on = new Image(140,16);
prog2on.src = "/image/layout/prog2on.gif";
prog3 = new Image(140,16);
prog3.src = "/image/layout/prog3.gif";
prog3on = new Image(140,16);
prog3on.src = "/image/layout/prog3on.gif";
prog4 = new Image(140,16);
prog4.src = "/image/layout/prog4.gif";
prog4on = new Image(140,16);
prog4on.src = "/image/layout/prog4on.gif";
prog5 = new Image(140,16);
prog5.src = "/image/layout/prog5.gif";
prog5on = new Image(140,16);
prog5on.src = "/image/layout/prog5on.gif";
ocio1 = new Image(140,16);
ocio1.src = "/image/layout/ocio1.gif";
ocio1on = new Image(140,16);
ocio1on.src = "/image/layout/ocio1on.gif";
ocio2 = new Image(140,16);
ocio2.src = "/image/layout/ocio2.gif";
ocio2on = new Image(140,16);
ocio2on.src = "/image/layout/ocio2on.gif";
ocio3 = new Image(140,16);
ocio3.src = "/image/layout/ocio3.gif";
ocio3on = new Image(140,16);
ocio3on.src = "/image/layout/ocio3on.gif";
ocio4 = new Image(140,16);
ocio4.src = "/image/layout/ocio4.gif";
ocio4on = new Image(140,16);
ocio4on.src = "/image/layout/ocio4on.gif";
guia1 = new Image(140,16);
guia1.src = "/image/layout/guia1.gif";
guia1on = new Image(140,16);
guia1on.src = "/image/layout/guia1on.gif";
guia2 = new Image(140,16);
guia2.src = "/image/layout/guia2.gif";
guia2on = new Image(140,16);
guia2on.src = "/image/layout/guia2on.gif";
guia3 = new Image(140,16);
guia3.src = "/image/layout/guia3.gif";
guia3on = new Image(140,16);
guia3on.src = "/image/layout/guia3on.gif";
guia4 = new Image(140,16);
guia4.src = "/image/layout/guia4.gif";
guia4on = new Image(140,16);
guia4on.src = "/image/layout/guia4on.gif";
guia5 = new Image(140,16);
guia5.src = "/image/layout/guia5.gif";
guia5on = new Image(140,16);
guia5on.src = "/image/layout/guia5on.gif";
guia6 = new Image(140,16);
guia6.src = "/image/layout/guia6.gif";
guia6on = new Image(140,16);
guia6on.src = "/image/layout/guia6on.gif";
guia7 = new Image(140,16);
guia7.src = "/image/layout/guia7.gif";
guia7on = new Image(140,16);
guia7on.src = "/image/layout/guia7on.gif";
corr = new Image(140,20);
corr.src = "/image/layout/corr.gif";
corron = new Image(140,20);
corron.src = "/image/layout/corron.gif";
hpage = new Image(140,20);
hpage.src = "/image/layout/hpage.gif";
hpageon = new Image(140,20);
hpageon.src = "/image/layout/hpageon.gif";
favor = new Image(140,20);
favor.src = "/image/layout/favor.gif";
favoron = new Image(140,20);
favoron.src = "/image/layout/favoron.gif";
}

function muda(imgDocID,imgObjName) {
if (browserVer == 1) {
        document.images[imgDocID].src = eval(imgObjName + ".src")
}}