[TYPO3-ect] xajax: page is being generated - error

[Franz Holzinger]

Hello,

an extension using xajax will give an error message if a user reloads
too frequently.
The reason for this is the 'page is being generated' message from TYPO3.

Error: the server returned the following HTTP status: 503
Received:
<?xml version= ...
<strong>Page is being generated.</strong><br />
If this message does not disappear withing 30 seconds please reload.
</body>...

Any error message should open in a new window.

See the attached patch.

- Franz