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

if (browserName == "Netscape" && browserVer >= 3) { browserCheck = "ok"; }

else { 

    if (browserName == "Microsoft Internet Explorer" && browserVer >= 3) { browserCheck = "ok"; }

    else { browserCheck = "bad"; }

}

if (browserCheck == "ok") { 

b1a = new Image(); b1a.src = "but0-1.gif";
b1b = new Image(); b1b.src = "but0-1a.gif";
b2a = new Image(); b2a.src = "but0-2.gif";
b2b = new Image(); b2b.src = "but0-2a.gif";
b3a = new Image(); b3a.src = "but0-3.gif";
b3b = new Image(); b3b.src = "but0-3a.gif";
b4a = new Image(); b4a.src = "but0-4.gif";
b4b = new Image(); b4b.src = "but0-4a.gif";
b5a = new Image(); b5a.src = "but0-5.gif";
b5b = new Image(); b5b.src = "but0-5a.gif";
b6a = new Image(); b6a.src = "but0-6.gif";
b6b = new Image(); b6b.src = "but0-6a.gif";
b7a = new Image(); b7a.src = "but0-7.gif";
b7b = new Image(); b7b.src = "but0-7a.gif";
b8a = new Image(); b8a.src = "but0-8.gif";
b8b = new Image(); b8b.src = "but0-8a.gif";
b9a = new Image(); b9a.src = "but0-9.gif";
b9b = new Image(); b9b.src = "but0-9a.gif";
b10a = new Image(); b10a.src = "but0-10.gif";
b10b = new Image(); b10b.src = "but0-10a.gif";
b11a = new Image(); b11a.src = "but0-11.gif";
b11b = new Image(); b11b.src = "but0-11a.gif";
}

function imgswap( Iname1, Iname2) { if (browserCheck == "ok") { document [Iname1].src
= eval(Iname2 + ".src"); } }