jQuery 關閉功能鍵 ( Disable Function Key )

function disableFKey(e){
    if( (e.which || e.keyCode) == 116 ){         // F5
        e.preventDefault();
    }else if( (e.which || e.keyCode) == 120 ){   // F9
        e.preventDefault();
        location.href = 'www.google.com'  // do something
    }
});

$(document).on("keydown", disableFKey);