Anyone know of a clever way to delete all DM's from one's inbox in Twitter?

Found some kind of "bookmarklet" but can't figure out for the life of me how to use it.

Help your computer challenged friend.

Thanks to rejeneration for my cookie!

Tried to send one back, but I hit add and it won't do anything. Will figure it out tomorrow!

Ok good night for real this time. Stop looking at me like that, I'm serious!

Ps. If anyone wants to follow me on twitter, my username is Brileyp.