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This article introduces the knowledge of "javascript ajax function instance usage". Many people will encounter such a dilemma in the operation of actual cases, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

The copy code is as follows:

/ / ajax test

Var xmlHttp

Function createXMLHttpRequest () {

If (window.ActiveXObject) {

XmlHttp=new ActiveXObject ("Microsoft.XMLHTTP")

}

Else if (window.XMLHttpRequest) {

XmlHttp=new XMLHttpRequest ()

}

}

Function a () {

CreateXMLHttpRequest ()

Url= "${request.contextPath} / test/forMain.action"

Alert (url)

Statechange

XmlHttp.open ("GET", url,true)

XmlHttp.Send (null)

Alert (xmlHttp.responseText)

}

Function statechange () {

Alert (xmlHttp.status)

If (xmlHttp.readyState = = 4) {/ / describes a "loaded" state; at this point, the response is fully received.

If (xmlHttp.status = = 200) {/ / 200 indicates successful receipt

Alert ("success")

Return xmlHttp.responseText; / / return value

}

Else {

Alert (failure)

}

}

}

This is the end of the introduction of "example usage of javascript ajax function". Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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