Random rotation of instantiated prefab along one axis

http://answers.unity3d.com/questions/20706/random-rotation I know this question has been raised once before although no clear answer was made

I'm trying to rotate a instantiated prefab along just the x axis at random, i've tried the Random.rotate but of course it rotates along all on the axis. I understand that i have to use Quaternion.eulerAngles but I'm still confused.

var grass : GameObject;

function Start() {
     var grassNum = Random.Range(200, 300);
     for (var i = 0; i < grassNum; i++){
        var position = Vector3(Random.Range(2, 6), 1.5, Random.Range(2, 6));
        Instantiate(grass, position, Quaternion.identity);
     }
}

Thanks - C

If you don't need an object reference, then you can instantiate the object after you create a rotation.:

var grass : GameObject;

function Start() {
     var grassNum = Random.Range(200, 300);
     for (var i = 0; i < grassNum; i++){

        var randomPosition = Vector3(Random.Range(2, 6), 1.5, Random.Range(2, 6));
        var randomRotation = Quaternion.Euler( Random.Range(0, 360) , 0 , 0);

        Instantiate(grass, randomPosition, randomRotation);

     }
}

And are you sure that you want to rotate around the x-axis? I would guess you want the y-axis which passes vertically through the object so you could spin it like a top and the bottom would stay flat.

How about something like that:

var grass : GameObject;

function Start() {
     var grassNum = Random.Range(200, 300);
     for (var i = 0; i < grassNum; i++){
        var position = Vector3(Random.Range(2, 6), 1.5, Random.Range(2, 6));
        var tempObj = Instantiate(grass, position, Quaternion.identity);
        tempObj.transform.eulerAngles.x = Random.Range(0, 360);
     }
}