Native Ajax notation that can be copied directly to apply

Method One:

function Createxmlhttprequest () {//1. Create a XMLHttpRequest object//This is the most complex step in the Xmlhttpreuquest object's use of no part//you need to write different code in different ways for IE and other types of browsers to build this object                varXMLHttpRequest; if(window. XMLHttpRequest) {//for FIREFOX,MOZILLAR,OPERA,SAFARI,IE7,IE8XMLHttpRequest =NewXMLHttpRequest (); //bug fixes for certain specific versions of Mozillar browser                    if(Xmlhttprequest.overridemimetype) {Xmlhttprequest.overridemimetype ("Text/xml"); }                } Else if(window. ActiveXObject) {//for IE6,IE5.5,IE5//Two control names that can be used to create XMLHttpRequest objects, saved in an array of JS//Newer version in front of the line                    varActivexname = ["msxml2.xmlhttp","Microsoft.XMLHTTP"];  for(vari =0; i < activexname.length; i++) {                        Try {                            //remove a control name to create and terminate the loop if the creation succeeds//If the creation fails, the exception is thrown back, then the loop can continue and the attempt to createXMLHttpRequest =NewActiveXObject (Activexname[i]); if(XMLHttpRequest) { Break; }                        } Catch(e) {} }}returnXMLHttpRequest; }//Post Methodfunction post () {//receive with variables after creating an AJAX native environment                varreq =createxmlhttprequest (); if(req) {//method of parameter, URL, whether asynchronous (Asyn)Req.open ("POST","webajax.ashx",true); //post must be set to this typeReq.setrequestheader ("Content-type","application/x-www-form-urlencoded"); //You must take this parameter, even if the method you want to invoke does not have parameters, whether it is a get or post with a parameter, and no argument is sent to nullReq.send (""); //The callback function, when readyState equals 4 and the status is 200, indicates that the response is ready and can do the data operation.Req.onreadystatechange =function () {if(Req.readystate = =4) {                            if(Req.status = = $) {                                //Req.responsetext can return back to the backgroundAlert"Success"); } Else{alert ("Error"); }                        }                                            }                }            }//Get MethodfunctionGet() {                varreq =createxmlhttprequest (); if(req) {Req.open ("GET","ajaxtest.aspx",true); Req.onreadystatechange=function () {if(Req.readystate = =4) {                            if(Req.status = = $) {alert (req.responsetext); } Else{alert ("Error"); }}} req.send (NULL); }            }

Method Two:

 //take the Get method as an example            varXMLHTTP; function Loadxmldoc (URL, cfunc) {//Create an environment                if(Window. XMLHttpRequest) {//code for ie7+, Firefox, Chrome, Opera, SafariXMLHTTP =NewXMLHttpRequest (); }                Else{//code for IE6, IE5XMLHTTP =NewActiveXObject ("Microsoft.XMLHTTP"); }                //To create a callback functionXmlhttp.onreadystatechange =Cfunc; //get mode to send dataXmlhttp.open ("GET"Urltrue);            Xmlhttp.send (); } function MyFunction () {//call the Ajax method described above, passing in the URL and the callback function implementation method (will be executed when the response is ready)Loadxmldoc ("/ajax/test1.txt", function () {if(Xmlhttp.readystate = =4&& Xmlhttp.status = = $) {document.getElementById ("mydiv"). InnerHTML =Xmlhttp.responsetext;            }                }); }

Native Ajax notation that can be copied directly to apply