Ajax creates the perfect compatibility code for XMLHTTP objects _ajax related

Copy Code code as follows:

function Creatajax () {
var ajax=null;
if (window. XMLHttpRequest) {
Create XMLHttpRequest objects for browsers such as Mozilla, Netscape, and Safari
Ajax = new XMLHttpRequest ();
if (Ajax.overridemimetype) {
If the header of the server response is not text/xml, you can call other methods to modify the header
Ajax.overridemimetype (' Text/xml ');
}
else if (window. ActiveXObject) {
For Internet Explorer browsers, create XMLHttpRequest
try{
Ajax = new ActiveXObject ("Msxml2.xmlhttp");
catch (e) {
try{
Ajax = new ActiveXObject ("Microsoft.XMLHTTP");
catch (e) {}
}
}
return Ajax;
}

Put the above code in the JS file. To facilitate direct call later