browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
if (browserName == "Netscape" && browserVer >= 3) version = "n3"; 
else if (browserName == "Microsoft Internet Explorer" && browserVer >= 4) version = "n3";
else version = "n2";
if (version == "n3")
{
	
b1 = new Image();
b1.src = "glowna/but_1_off.gif";
b1_on = new Image();
b1_on.src = "glowna/but_1_on.gif";

b2 = new Image();
b2.src = "glowna/but_2_off.gif";
b2_on = new Image();
b2_on.src = "glowna/but_2_on.gif";

b3 = new Image();
b3.src = "glowna/but_3_off.gif";
b3_on = new Image();
b3_on.src = "glowna/but_3_on.gif";

b4 = new Image();
b4.src = "glowna/but_4_off.gif";
b4_on = new Image();
b4_on.src = "glowna/but_4_on.gif";

b5 = new Image();
b5.src = "glowna/but_5_off.gif";
b5_on = new Image();
b5_on.src = "glowna/but_5_on.gif";

b6 = new Image();
b6.src = "glowna/but_6_off.gif";
b6_on = new Image();
b6_on.src = "glowna/but_6_on.gif";

b7 = new Image();
b7.src = "glowna/but_7_off.gif";
b7_on = new Image();
b7_on.src = "glowna/but_7_on.gif";

add_url = new Image();
add_url.src = "glowna/dodaj_url_1.gif";
add_url_on = new Image();
add_url_on.src = "glowna/dodaj_url_2.gif";

add_page = new Image();
add_page.src = "glowna/dodaj_strone_1.gif";
add_page_on = new Image();
add_page_on.src = "glowna/dodaj_strone_2.gif";


function img_on(imgName) {
if (version == "n3") {
imgOn = eval(imgName + "_on.src");
document [imgName].src = imgOn;} }
function img_out(imgName) {
if (version == "n3") {
imgOut = eval(imgName + ".src");
document [imgName].src = imgOut;
} }
}