function isIE() {
  if (navigator.userAgent.indexOf('MSIE') >= 0) {
  return 1;
  }
  return 0;
}
function isNetscape() {
  if (navigator.userAgent.indexOf('Netscape') >= 0) {
  return 1;
  }
  return 0;
}
var is_ie = isIE();
var is_ie5 = 1;
var is_netscape = isNetscape();