browser_version= parseInt(navigator.appVersion);
browser_type= navigator.appName;

if (browser_type == "Microsoft Internet Explorer" && (browser_version >= 4)) { 
document.write("<link rel='stylesheet' type='text/css' href='style.css' media='all'>");
}


else  { 
document.write("<link rel='stylesheet' type='text/css' href='chromestyle.css' media='all'>");
}