Generating +-5V from 7805 and 7905

I've found this schematic diagram for generating + and - 5V from a single DC supply.

From what I usually see, voltage regulators have capacitors connected on the input and output sides.
However, I do not know where to connect the capacitors in this dual supply case.
Can someone please tell me where to connect them and the values?

**broken link removed**

Looks like some sort of a bridge circuit to me. Except, this one is one bridge to far! E

Won't do the trick, no

You can't make 24V to get 2x15V=30V just like this.

By this circuit, you say that the difference between 24V and 15 is 15V. Can that be true?
Se the logic?

[edit]
And the second change to your figure show a basic circuit to making a virtual ground.

The OP's schematic is rather the electronic equivalent of an Escher drawing.