//PC and browser identificatio: MS Exlporer-Navigator & PC-MAC
if(document.all)
{
 if(navigator.platform =="Win32")
  document.write('<link rel="stylesheet" type="text/css" href="codice/style_pc_ie_video.css">');
 else
  document.write('<link rel="stylesheet" type="text/css" href="codice/style_pc_ie_video.css">');
}
else
{
 if(navigator.platform =="MacPPC")
  document.write('<link rel="stylesheet" type="text/css" href="codice/style_pc_ie_video.css">');
 else
  document.write('<link rel="stylesheet" type="text/css" href="codice/style_pc_ie_video.css">');
 }