AJAX initial development framework
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<script Language="javascript">
Var http_request = false;
Function send_request (url) (/ / initialization, the designated processing function, a function of the request sent
Http_request = false;
/ / Initialization started XMLHttpRequest object
If (window.XMLHttpRequest) (/ / Mozilla browser
Http_request = new XMLHttpRequest ();
If (http_request.overrideMimeType) (/ / Set MiME category
Http_request.overrideMimeType ( "text / xml");
)
)
Else if (window.ActiveXObject) (/ / IE browser
Try (
Http_request = new ActiveXObject ( "Msxml2.XMLHTTP");
) Catch (e) (
Try (
Http_request = new ActiveXObject ( "Microsoft.XMLHTTP");
) Catch (e) ()
)
)
If (! Http_request) (/ / anomaly, the failure to create instances
Window.alert ( "can not create XMLHttpRequest object instance.");
Return false;
)
Http_request.onreadystatechange = processRequest;
/ / Determine the modalities and sent the request url and the simultaneous implementation of the code
Http_request.open ( "GET", url, true);
Http_request.send (null);
)
/ / Return information processing function
Function processRequest () (
If (http_request.readyState == 4) (/ / Object state judge
If (http_request.status == 200) (/ / information has been successfully returned to start processing information
Alert (http_request.responseText);
) Else (/ / pages is not normal
Alert ( "You have an unusual request pages.");
)
)
)
</ Script>
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