write a Method of getCharCode in eventUtil.js

Signed-off-by: arcticlion <david.malan@aol.com>
write a Usage of getCharCode in eventUtil.js

Signed-off-by: arcticlion <david.malan@aol.com>
write a Usage of event.data in keybroad.js

Signed-off-by: arcticlion <david.malan@aol.com>