A simple Ajax class library and the use Method instance analysis _ajax correlation

This article illustrates a simple Ajax class library and how to use it. Share to everyone for your reference, specific as follows:

Ajax.js

function Ajax (recvtype) {var aj=new Object (); Aj.recvtype=recvtype?
  Recvtype.touppercase (): ' HTML '//html XML aj.targeturl= ';
  Aj.sendstring= ';
  Aj.resulthandle=null;
  Aj.createxmlhttprequest=function () {var request=false; A XMLHttpRequest presence in the Window object is not IE, including (IE7,IE8) if (window).
    XMLHttpRequest) {request=new XMLHttpRequest ();
    if (request.overridemimetype) {request.overridemimetype ("text/xml"); The ActiveXObject attribute exists in the//window object is IE}else if (window. ActiveXObject) {var versions=[' microsoft.xmlhttp ', ' MSXML. XMLHTTP ', ' msxml2.xmlhttp.7.0 ', ' msxml2.xmlhttp.6.0 ', ' msxml2.xmlhttp.5.0 ', ' msxml2.xmlhttp.4.0 ', ' MSXML2. xmlhttp.3.0 ', ' MSXML2.
    XMLHTTP '];
        for (var i=0 i<versions.length; i++) {try{request=new ActiveXObject (Versions[i]);
        if (request) {return request;
      }}catch (e) {request=false;
  }} return request; AJ.
  Xmlhttprequest=aj.createxmlhttprequest (); Aj.processhandle=function () {if (AJ. Xmlhttprequest.readystate = = 4) {if (AJ. Xmlhttprequest.status = = = {if (aj.recvtype== "HTML") Aj.resulthandle (AJ.
        Xmlhttprequest.responsetext); else if (aj.recvtype== "XML") Aj.resulthandle (AJ.
      Xmlhttprequest.responsexml);
    }} aj.get=function (TargetUrl, resulthandle) {aj.targeturl=targeturl; if (resulthandle!=null) {aj.
      Xmlhttprequest.onreadystatechange=aj.processhandle;
    Aj.resulthandle=resulthandle; } if (window. XMLHttpRequest) {aj.
      Xmlhttprequest.open ("Get", aj.targeturl); Aj.
    Xmlhttprequest.send (NULL); }else{AJ.
      Xmlhttprequest.open ("Get", Aj.targeturl, True); Aj.
    Xmlhttprequest.send ();
    } aj.post=function (TargetUrl, sendstring, resulthandle) {aj.targeturl=targeturl;
      if (typeof (sendstring) = = "Object") {var str= "";
      For (Var pro in sendstring) {str+=pro+ "=" +sendstring[pro]+ "&"; } aj.sendstring=str.substr (0, Str.lengtH-1);
    }else{aj.sendstring=sendstring; } if (Resulthandle!=null) {aj.
      Xmlhttprequest.onreadystatechange=aj.processhandle;
    Aj.resulthandle=resulthandle; AJ.
    Xmlhttprequest.open ("Post", TargetUrl); Aj.
    Xmlhttprequest.setrequestheader ("Content-type", "application/x-www-form-urlencoded"); Aj.
  Xmlhttprequest.send (aj.sendstring);
return to AJ;

 }

Use method:

<script type= "Text/javascript" > var ajax = Ajax (); Instantiate the object, default to HTTP, if incoming XML, return XML object//Ajax Get method Use description/** * Function (TargetUrl, resulthandle) * @param string TargetUrl passes past URL address * @param string Resulthandle callback function, Optional * * Ajax.get (' test.php?name=liruxing&email=liruxing1
    715@sina.com ', function (data) {eval ("var obj=" +data);
    alert (obj.name);
  alert (Obj.email);
  });  Ajax Post Method Use description/** * Function (TargetUrl, sendstring, resulthandle) * @param string TargetUrl pass past URL address * @param string sendstring parameter value * @param string Resulthandle callback function, Optional */ajax.post (' test.php ', ' Name=liruxing&emai
    L=liruxing1715@sina.com ', function (data) {eval ("var obj=" +data);
    alert (obj.name);
  alert (Obj.email);
    //Post the second format, the second parameter is Json format ajax.post (' test.php ', {name: ' Lijou star ', email: ' liruxing1715@sina.com '}, function (data) {
    Eval ("var obj=" +data);
    alert (obj.name);
  alert (Obj.email);

 }) </script>

For more information on AJAX-related content readers can view the site topics: "JQuery Ajax Usage Summary", "JavaScript Ajax Operating Skills summary", "Php+ajax Techniques and Application Summary" and "ASP.net Ajax skills Summary of the topic"

I hope this article will help you with Ajax programming.