;var csstype="external"; //Specify type of CSS to use. "Inline" or "external"
var mac_externalcss='squelettes/css/styleMac.css'; //if "external", specify Mac css file here
var pc_externalcss='squelettes/css/stylePC.css'; //if "external", specify PC/default css file here

var mactest=navigator.userAgent.indexOf("Mac")!=-1;
if (csstype=="external"){
document.write('<link rel="stylesheet" type="text/css" href="'+ (mactest? mac_externalcss : pc_externalcss) +'">');
}