A simple Ajax request class

Ajax| Request

In addition to the blog without refreshing search and instant verification detection, and looked at the code, feel too troublesome, the XMLHttpRequest request package into a class inside, use it more convenient, do not remember so much code, what create XMLHttpRequest object or something, This part of the code is also relatively high reusability ~ has been packaged, at the end of the log download.
To see the effect of the point open the sidebar of the log search, there is a no refresh search, it is, or in the reading log or in the guest book registration code where there is instant detection, if not input verification code or the wrong authentication code, the input box will turn red '
Class Name: Ajaxrequest
Create method: Var ajaxobj=new ajaxrequest, return False if creation fails
Properties: Method-Request methods, strings, post or get, default to post
URL-Request URL, string, default is NULL
Async-Asynchronous, true to asynchronous, false to synchronous, default to True
Content-the contents of the request, if this attribute is set by the request method for post, the default is null
Callback-callback function, that is, the function called when the response content is returned, the default is direct return, and the callback function has a parameter of XMLHttpRequest object, that is, when defining a callback function: function Mycallback (xmlobj)
Method: send-sending request, no parameters
An example:
[Copy this Code] CODE:
<script type= "Text/javascript" src= "Ajaxrequest.js" ></script>
<script type= "Text/javascript" >
var ajaxobj=new ajaxrequest; Creating Ajax Objects
Ajaxobj.method= "Get"; Set the request mode to get
Ajaxobj.url= "Default.asp"//URL is default.asp
Set callback function, output response content
Ajaxobj.callback=function (xmlobj) {
document.write (Xmlobj.responsetext);
}
Ajaxobj.send (); Send Request

[Copy this Code] CODE:
Ajax classes
function Ajaxrequest () {
var xmlobj = false;
var cbfunc,objself;
Objself=this;
try {xmlobj=new XMLHttpRequest;}
catch (e) {
try {xmlobj=new ActiveXObject ("MSXML2. XMLHTTP "); }
catch (E2) {
try {xmlobj=new ActiveXObject ("Microsoft.XMLHTTP");}
catch (E3) {Xmlobj=false}
}
}
if (!xmlobj) return false;
This.method= "POST";
This.url;
This.async=true;
This.content= "";
This.callback=function (cbobj) {return;}
This.send=function () {
if (!this.method| |! this.url| |! This.async) return false;
Xmlobj.open (This.method, This.url, This.async);
if (this.method== "POST") Xmlobj.setrequestheader ("Content-type", "application/x-www-form-urlencoded");
Xmlobj.onreadystatechange=function () {
if (xmlobj.readystate==4) {
if (xmlobj.status==200) {
Objself.callback (Xmlobj);
}
}
}
if (this.method== "POST") xmlobj.send (this.content);
else xmlobj.send (NULL);
}
}