Camera rotates on wrong axis

hello i have a problem with my camera rotating on the wrong axis, it rotates vertical instead of horizontal. the camera is for my rts style game were u can hold the middle mouse button to rotate around at camera position. any help would be appreciated. ty srry for the noob question.

here's my code

 var target : Transform; //What to rotate around
 var xSpeed = 125.0; //X sensitivity
 var ySpeed = 50.0; //Y sensitivity
  
 private var x = 0.0; //Angle of the y rotation?
 private var y = 0.0; //Angle of the x rotation?
 
  
 @script AddComponentMenu("Scripts/Mouse Orbit") //Add to menu
 //
 
 
 function Start () 
 {
 // Camera Orbit
 var angles = transform.eulerAngles;
 x = angles.y;
 y = angles.x;
 
  if (rigidbody)
 rigidbody.freezeRotation = true;
 
 }
 
 
 function Update () {
 
 if (Input.GetMouseButton(2)) 
 {
  if (target) //There's a target
 
 //Change the angles by the mouse movement
 x += Input.GetAxis("Mouse X") * xSpeed * 0.02;
 y -= Input.GetAxis("Mouse Y") * ySpeed * 0.02;
  
 //Rotate the camera to those angles
 var rotation = Quaternion.Euler(y, x, 0);
 transform.rotation = rotation;
 
 }
 }