if (document.all) {
  document.write("<link rel=stylesheet href=../css/substiler-ie.css type=text/css>");
}
else if (document.layers) {
 document.write("<link rel=stylesheet href=../css/substiler.css type=text/css>");
}
else if (document.getElementById) {
  document.write("<link rel=stylesheet href=../css/substiler.css type=text/css>");
}
else {
  document.write("<link rel=stylesheet href=../css/substiler-ie.css type=text/css>");
}