spawning problem

I can't seam to get this script to work for spawning an enemy.

var evilsphere : Transform;

function Update ()
Instantiate (evilsphere,transform.Find("spawnpoint")transform.position,

Also I would like the enemy to be spawned randomly, how should I do that?

If this is your script you probably get a syntax error because you're missing a dot between ("spawnpoint") and transform.position. Also instead of searching for the object named spawnpoint it would be a good idea to save a reference to the spawnpoint. (like you did for the prefab)

If you want to spawn at random position look into Random.insideUnitCircle.