Simply selects the active camera from the current viewport (even if cameras / layer is hidden). If you've ever been frustrated because you're working full screen looking through the camera lens then need to change something about your camera, this script is for you. In that case you just run the script and bam you're able to edit camera properties in the stack or adjust keys in the time slider all with a single keystroke instead of having to hunt around in the select by name dialog...
Usage: