Line Renderer & Raycasting SOS !!!

hi everyone,

I'm working on a player(robot), who can shoot lasers with the eyes, i've made this following script, but unity give me 4 errors, I've searched everywhere and unity don't change, i've everytimes this errors :

Assets/Robot/Scripts/Aim Head.js(15,36): BCE0023: No appropriate version of 'UnityEngine.Physics.Raycast' for the argument list '(UnityEngine.Ray, System.Type, float)' was found.

Assets/Robot/Scripts/Aim Head.js(16,63): BCE0019: 'point' is not a member of 'System.Type'.

Assets/Robot/Scripts/Aim Head.js(18,36): BCE0023: No appropriate version of 'UnityEngine.Physics.Raycast' for the argument list '(UnityEngine.Ray, System.Type, float)' was found.

Assets/Robot/Scripts/Aim Head.js(18,69): BCE0019: 'point' is not a member of 'System.Type'.

This is my bad script :

 var leftEye : Transform;
 
 var rightEye : Transform;
 
 var laser : LineRenderer;
 
 var maxDetection : float;
 
 var shotKey : KeyCode;
 
 
 function Update () {
 
     var hit = RaycastHit;
     var rayl = new Ray (leftEye.position, leftEye.forward);
     var rayr = new Ray (rightEye.position, rightEye.forward);
 
     if(Input.GetKeyDown(shotKey)) {
 
         var laserClone = Instantiate(laser, leftEye.position, leftEye.rotation) as LineRenderer;
         var SecondLaserClone = Instantiate(laser, rightEye.position, eyeRight.rotation)as LineRenderer;
     
         laserClone.SetPosition(0, rayl.origin);
         SecondLaserClone.SetPosition(0, rayr.origin);
     
     
         if (Physics.Raycast(rayl, hit, maxDetection)) {
     
                 laserClone.SetPosition(1, hit.point);
         }
     
         if (Physics.Raycast(rayr, hit, maxDetection)) {
         
                 SecondLaserClone.SetPosition(1, hit.point);
         }
     }
     
 }    

Please explain me, i'm lost !

P.S : sorry for my bad english , i'm a french man.

Thanks for advance. Regards