I play Scrabble online at Scrabulous - http://www.scrabulous.com - is it original Scrabble or a bit modified?

I am asking because the game does not end once both players cannot play their tiles. I am not sure what to do after that?! In real Scrabble we just declare one person the winner after adjusting for unplayed tiles, so how does it work at Scrabulous?|||The game will end after a preset number of consecutive passes.|||You just have to click on the PASS button. As per official Scrabble rules the game will be drawn after 6 continuous scores of 0. So that will be 3 passes each.|||Just keep passing...