browser_version= parseInt(navigator.appVersion); 
browser_type = navigator.appName; 
if (browser_type == "Netscape" && (browser_version >= 4) && (browser_version < 5)) { 
document.write("<LINK rel='STYLESHEET' type='text/css' href='http://www.lincolnelectric.com/inc/css/navnet.css'>"); 
} 
else { 
document.write("<LINK rel='STYLESHEET' type='text/css' href='http://www.lincolnelectric.com/inc/css/nav.css'>"); 
}