Comments on: Basic AJAX with XMLHttpRequest Class

by: Cameron Manderson

Tue, 22 Aug 2006 22:32:45 +0000

Ensure if you are using a server side response that is built be a script that you specify the expiry headers manually. IE reportedly has a bug. From PHP the example would be as follows:

header( “Expires: Mon, 26 Jul 1997 05:00:00 GMT” ); // disable IE caching
header( “Last-Modified: ” . gmdate( “D, d M Y H:i:s” ) . ” GMT” );
header( “Cache-Control: no-cache, must-revalidate” );
header( “Pragma: no-cache” );

by: Cameron Manderson

Tue, 22 Aug 2006 22:31:39 +0000

When you make a request with POST you will need to specify the “something…” like the contents of a GET request:

myvar=myVal&whichever=whatever

This will need to be correctly encoded the same you do for GET requests.

Have a look at a reference I found for you:
http://www.yourhtmlsource.com/javascript/ajax.html#buildingarequest

by: ivan kubica

Tue, 22 Aug 2006 13:47:13 +0000

Does anybody know, how to use send fucntion with POST?
XMLHttpRequest.open(”POST”, url, true);
XMLHttpRequest.send(something….)
How can I specify the “something…”?
thanx

by: Cameron Manderson

Sun, 13 Aug 2006 22:42:16 +0000

Nice pickup

by: Richard Lee

Fri, 11 Aug 2006 00:21:54 +0000

Cam, I also read older versions of Mozilla lock-up if the server returns anything other than XML, so they suggest adding overrideMimeType method call in the Mozilla/Safari code
xmlHttpReq.overrideMimeType('text/xml');

by: Richard Lee

Thu, 10 Aug 2006 02:09:46 +0000

Another good reference I came across today:
http://developer.mozilla.org/en/docs/AJAX

by: Cameron Manderson

Wed, 09 Aug 2006 01:08:57 +0000

Some more good reference material for using AJAX:
- http://developer.apple.com/internet/webcontent/xmlhttpreq.html
- http://ajaxpatterns.org/wiki/index.php?title=Main_Page
- http://en.wikipedia.org/wiki/AJAX
- http://www.w3schools.com/ajax/default.asp