Solve the problem that the Firefox browser does not support Ajax's transport. responsexml method.

If (window. activexobject) return New activexobject ('Microsoft. xmlhttp ')
Else if (window. XMLHttpRequest) return New XMLHttpRequest ()
AboveCodeThe IE browser uses new activexobject ('Microsoft. XMLHTTP ') returns an XMLHTTP instance, while in Firefox, new XMLHttpRequest () is used to return an asynchronous request object instance. If you need to retrieve the XML returned by them, the call methods of the two are different, the former uses the responsexml attribute to return, while the latter uses the responsexml attribute to both use the responsetxml value, but ie supports responsexml while FF does not, in addition, the Firefox technical support page is recommended for this purpose:
VaR parser = new domparser ();
Xml = parser. parsefromstring (transport. responsetext, "text/XML ");

In addition, the value returned by responsexml is used in Firefox. The selectnodes and selectsinglenode methods are not supported. Only the getelementsbytagname method can be used.