HangOuts Full Screen - keyboard shortcut

Hangouts.js

// Instrucciones
// Ctrl + Shift + C 
// Click en cualquier elemento
// Seleccionar pestaña Consola
// Pegar el script y presionar Enter
// Cerra la ventana y podes usar los atajos de las teclas siguientes:

// Ctrl + z  :: Full Screen 
// Ctrl + x  :: Hiden Options
// Ctrl + c  :: Show  Options

document.onkeydown = function(key){
   // 
   //  Writed by BleICer for CLS - CTF
   //
    if ( key.keyCode == 17 ){

        this.onkeydown = function(k){
            if ( k.keyCode == 90 ){
                
                document.getElementsByClassName('p2hjYe rCuEk')[0].style = "position: fixed;top: 0px;left: 0px;width: 100%;height: 100%;background: black;"
            }else if ( k.keyCode == 88 ){
                document.getElementsByClassName('G1OBde')[0].style="visibility: hidden;"
                document.getElementsByClassName('oNuiKf B4D2wf')[0].style="visibility: hidden;"
            }else if ( k.keyCode == 67 ){
                document.getElementsByClassName('G1OBde')[0].style="visibility: visible;"
                document.getElementsByClassName('oNuiKf B4D2wf')[0].style="visibility: visible;"
            }
        }
    }
}