Trigger animation OnMouseDown

Hi everyone...still a newbie here :) I'm working on an educational game and have an issue...i want the player to be animated once the games starts to an entrance (done)...and then the animation to stop (not done)....the user clicks on the door, the door animates open and then the player again is animated to enter the room....

for the door i tried this (thankfully taken from this forum)

var door : GameObject; //Assign this in the editor or in Start, find the door

function OnMouseDown() { door.animation.Play("door_anim"); }

I attached it to the door and it does nothing...also the player just keeps moving to the next waypoint without stopping....HEEEEEEEEEEEEEEEEEEEEEEELP