Spider-Man — save this jury!

A Manhattan Supreme Court jury spent 6½ hours yesterday deliberating the “too dumb to be guilty” defense of Kirsten Dunst’s accused purse-swiper without reaching a verdict. They’re back at it today.

Jurors are apparently stuck over whether to believe if James Jimenez, 35, indeed believed he could wander the off-limit areas of the Soho Grand Hotel for an hour — at 4 a.m. — because his heroin-dealer buddy told him it was OK.