if(navigator.appVersion.indexOf("Mac") !=-1){
	document.write("<link rel=stylesheet href='styles_mac2.css' type='text/css'>");
}

else if(navigator.appVersion.indexOf("Win") !=-1){
	document.write("<link rel=stylesheet href='styles_win2.css' type='text/css'>");
}

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