> window.addEvent('domready', function(){
> $('content').load('test.php').
> periodical(5000);
You aren't using periodical correctly.
http://mootools.net/docs/core/Native/Function#Function:periodical
i.e. .load.periodical(5000,this,'test.php')
It's important to remember the JS order of operations. The way you
have it, the _value returned_ from ::load() is being run periodically,
not the function ::load itself. In some situations you may very well
want to chain functions like this, but not here.
-- Sandy