if (navigator.platform.indexOf ("Mac") != -1) {
function createStylesheetLink(cssname){
	document.writeln('<link rel="stylesheet" type="text/css" href="http://x51.org/styles/'+cssname+'.css" title="alternate" />');
}
userAgent=navigator.userAgent;
if ((userAgent.indexOf('MSIE 5.12') != -1) || (userAgent.indexOf('MSIE 5.2') != -1)) {
	/* IE 5.12 for Mac OS X 10.0, IE 5.2 for Mac OS X 10.3 */
	createStylesheetLink("mac_carbon");
} else if ((userAgent.indexOf('Mozilla') != -1) && (userAgent.indexOf('Mac OS X') != -1)) {
	if (userAgent.indexOf('AppleWebKit') != -1){
		/* Apple Safari, OmniWeb 4.5 */
		createStylesheetLink("mac_webkit");
	}else{
		/* Netscape 6 or later */
		createStylesheetLink("mac_carbon");
	}
}
}