tmt_css_Mac = "css/mac/default.css";
tmt_css_Win = "css/win/default.css";
if((navigator.appVersion.indexOf("Mac")!= -1)){
   document.write("<link rel='stylesheet' href='" + tmt_css_Mac + "' type='text/css'>");
}
else{
   document.write("<link rel='stylesheet' href='" + tmt_css_Win + "' type='text/css'>");
}