tmt_css_Mac = "./css/mac.css";
tmt_css_Win = "./css/win.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'>");
}