Rails spinoffs - Feb 2008 - prototype-1.6.0.2 Newbie Why is AJAX.request fired 3 times?

Hello list!

I am taking my first steps with AJAX and decided to give prototype a
try.

- I add a reference to the script to my page
- Then somewhere near the bottom of the page I fire up:
                new Ajax.Request(''ws_adrestype.php'', {
			  method:''get'',
			  requestHeaders: {Accept: ''application/json''},
				  onSuccess: function(transport){
				  	var json = transport.responseText.evalJSON(true);
				  },
				  onError: function(){
		    		alert(''Response was no JSON'');
				  }
			  });

And when I inspect the loading of the page with Firebug, I see that
the request to my ws_adrestype.php is made three times. these requests
get a response in 427, 260 and 121 ms. My ws_adrestype.php is
currently running a not so optimized function. It selects all the
unique address types from a postGres database by using a group by
clause. Since the database is over 50000 records, I would like to make
sure the request is made as less as possible. Therefor I am determined
to strip the three calls to a single one.

Another thing,

My webpage is an edit page. Besides prototype, it also contains:
- Google Maps script to show an address location in the page that can
be dragged to move an address on a map
- TinyMCE script to give the user the ability to enter fancy HTML that
is then displayed in Google Earth in the so called "balloon"

Can it be that GoogleMaps, TinyMCE and Prototyp ALL fire up my
AJAX.request under water?

As I said, I am a AJAX newbie. So any suggestion or help is
appreciated!


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