When you're watching "The Dark Knight Rises" it's okay to have thoughts about becoming Batman YOURSELF.  Well, if you do . . . get ready to cash in your IRA.

A website has calculated the cost of becoming Batman and it comes out to approximately $785,000.  Here's a breakdown . . .

One year of elite martial arts training, $75,000.

Kevlar utility harness, $340.

Gas-powered magnetic grappling gun, $1,800.

Advanced Kevlar armor bat suit, $300,000.

Cape with hang glider potential, $3,400.

Proper Bat vehicle.  In lieu of building the Batmobile or Batman's Tumbler, you'll probably want a Humvee for $140,000.

Custom graphite helmet, $250.  Bruce Wayne orders 10,000 of them . . . but you're going to get started with one.

Sound amplifier for bat ears, $30.

Full-time butler, $263,000.

Ten Boomerangs and five riot grenades, $1,200.

Twenty cans of black spray paint, $120.

TOTAL COST:  $785,140.

Also, you don't NEED a house with a hidden Bat Cave underneath, but if you want one, it's estimated that Wayne Manor is 42,500 square feet and costs about $32.1 MILLION.  It's got 11 bedrooms, seven baths, a pool, and, again, a hidden Bat Cave.