bName = navigator.appName; 
bVer = parseInt(navigator.appVersion);
isMac = (navigator.appVersion.indexOf("Mac") != -1);

if(bName == "Netscape" && isMac==true) document.write('<link rel="stylesheet" href="scripts/mac.css">');
else if(bName == "Microsoft Internet Explorer") document.write('<link rel="stylesheet" href="scripts/ie.css">');
if(bName == "Netscape" && isMac==false) document.write('<link rel="stylesheet" href="scripts/ns.css">');

function setimg(imgname)
{
var NS=document.layers;
if ((parent.frames['header']) || (parent.frames.header))
{
if (NS)
var theobj=eval("parent.frames['header'].document.topbanner")
else
var theobj=eval("parent.frames.header.topbanner");
theobj.src = imgname;
}
}

function setimglink(imglink,imglinktarget)
{
var NS=document.layers;
if ((parent.frames['header']) || (parent.frames.header))
{
if (NS)
var theobj=eval("parent.frames['header'].document.toplink")
else
var theobj=eval("parent.frames.header.toplink");
theobj.href = imglink;
theobj.target = imglinktarget;
}
}