need help with trigger

i want it so when ever a player go passed that trigger it changes level how do i do that

In the docs, look up OnTriggerEnter() and LoadLevel(). (Just type the function names into the search box.)

If there are other objects that can interact with the trigger, you might also need to check to see if the object in question is the player object (you can do this, for example, by checking the object's tag or name).