[jQuery] Meio mask

Hi everyone. I'm having troubles with meiomask to allow spaces in a field that will allow only letters, numbers and spaces of course. I've tried already with the responses but, doesn't work. Any help?

[jQuery] Meio mask

Hi everyone. I'm having troubles with meiomask to allow spaces in a field that will allow only letters, numbers and spaces of course. I've tried already with the responses but, doesn't work. Any help? Thanks