How to make the camera rotate only when right click is held down on the mouse?

I have been watching this guy on Youtube and he has made a series of tutorials for MMORPG games for unity. I downloaded one of his scripts which he released which was the camera movement however when you left click the camera rotates, When you right click the camera rotates again! I want to make it so it only rotates when the right button is held down to rotate. I know there have been previous answers about it however when i tried the solutions they didnt work cause i must have placed them in the wrong place. This is the camera rotate for my game however it works for both left and right buttons.

         // If either mouse buttons are down, let the mouse govern camera position
         if (GUIUtility.hotControl == 0)
         {
                 if (Input.GetMouseButton(0) || Input.GetMouseButton(1))
                 {
                         //Check to see if mouse input is allowed on the axis
                         if (allowMouseInputX)
                                 xDeg += Input.GetAxis ("Mouse X") * xSpeed * 0.02;
                         else
                                 RotateBehindTarget();
                         if (allowMouseInputY)
                                 yDeg -= Input.GetAxis ("Mouse Y") * ySpeed * 0.02;
                        
                         //Interrupt rotating behind if mouse wants to control rotation
                         if (!lockToRearOfTarget)
                                 rotateBehind = false;
                 }
                
         // otherwise, ease behind the target if any of the directional keys are pressed
                 else if (Input.GetAxis("Vertical") != 0 || Input.GetAxis("Horizontal") != 0 || rotateBehind)
                 {
                         //RotateBehindTarget();
                 }
         }

P.S - I have just started Unity so i have only just made the account however i am willing to share and release my progress to help the community once i am advanced at Unity.

Thanks in advanced.