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This article mainly explains "the usage of AJAX request class". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "the usage of AJAX request class".

The code is as follows:

/ / AJAX class

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)

}

}

AJAX request class

By HotHeart (warm-hearted)

Site: http://www.xujiwei.cn/

Blog: http://www.xujiwei.cn/blog/

Class name: AJAX

Creation method: var ajaxobj=new AJAX;, returns false if creation fails

Attribute: method-request method, string, POST or GET. Default is POST

Url-request URL, string, empty by default

Async-whether asynchronous. True is asynchronous, false is synchronous. Default is true.

Content-the content of the request. If the request method is POST, this property needs to be set. Default is empty.

Callback-callback function, that is, the function that is called when the response content is returned. By default, the callback function is returned directly. The callback function has a parameter of XMLHttpRequest object, that is, the callback function should be defined as follows: function mycallback (xmlobj)

Method: send ()-send a request with no parameters

An example:

Var ajaxobj=new AJAXRequest; / / create AJAX object

Ajaxobj.method= "GET"; / / set the request method to GET

Ajaxobj.url= "default.asp" / / URL is default.asp

/ / set the callback function and output the response content

Ajaxobj.callback=function (xmlobj) {

[xss_clean] (xmlobj.responseText)

}

Ajaxobj.send (); / / send the request

Thank you for reading, the above is the content of "the usage of AJAX request class". After the study of this article, I believe you have a deeper understanding of the usage of AJAX request class, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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