var ajax=false;
/*@cc_on @*/
/*@if (@_jscript_version >= 5)
 try {
  ajax = new ActiveXObject("Msxml2.XMLHTTP");
 } catch (e) {
  try {
   ajax = new ActiveXObject("Microsoft.XMLHTTP");
  } catch (E) {
   ajax = false;
  }
 }
@end @*/
if (!ajax && typeof XMLHttpRequest != 'undefined') {
  ajax = new XMLHttpRequest();
}