As Tobie pointed out, Ajax requests are *asynchronous*, so the request
fires and then the function exits while the results are being fetched.
This means JSON_REQUEST will finish, and normal program flow will
continue, so the alert(myvar) outside the function will get called,
but, *since the request is still being processed*, myvar is still
undefined.
So you have to wait until the request finishes and onSuccess/onFailure
get called, and then myvar will be made global.
If you need to process myvar, then you have to do it from the on* callback.
Best,
-Nicolas
On Dec 24, 2007 1:19 AM, Aea <[EMAIL PROTECTED]> wrote:
>
> Thanks for the heads up, here's what I have now...
>
>
> function JSON_REQUEST()
> {
> new Ajax.Request('process.php?mode=json', { method:'get', onSuccess:
> function(transport){myvar = transport.headerJSON, alert(myvar);}
> });
> }
>
> JSON_REQUEST();
> alert(myvar);
>
> Still get an alert with the object, then a warning that myvar is
> undefined.
>
> Can somebody provide an example of how I would get that json object
> out of the onSuccess and into the scope of my program, either as a
> global variable or something that's returned?
>
> >
>
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