if (navigator.appVersion.indexOf("Mac")!=-1) {
document.write("<LINK REL='stylesheet' HREF='css/iestyle.css'>"); }

else if (navigator.appName == "Netscape") {
document.write("<LINK REL='stylesheet' HREF='css/nsstyle.css'>"); }

else {
document.write("<LINK REL='stylesheet' HREF='css/iestyle.css'>"); }