var  Crosshair1 : Texture;
var Crosshairshow =true ; 
function OnGUI()

{
    if( Crosshairshow ==true)
    {
    Screen.showCursor=false ;
    }
    GUI.DrawTexture(Rect(Input.mousePosition.x- Crosshair1.width/2 ,(Screen.height-Input.mousePosition.y)- Crosshair1.height/2,Crosshair1.width,Crosshair1.height), Crosshair1);
} 

var addenemy : GameObject;
   function  Update()
       {
        if (Input.GetKeyDown("mouse 0"))
        {
            var hit:RaycastHit;
            var ray :Ray = Camera.mainCamera.ScreenPointToRay(Input.mousePosition);

            if (Physics.Raycast(ray, hit))
            {
               MousePoint = new Vector3(hit.point.x,hit.point.y+1, hit.point.z);
               Instantiate(addenemy, MousePoint, transform.rotation);
            }
        }
        }