Here's some code:
<form>
<input type="text" name="Title" pattern="[a-zA-Z0-9`\~\!\@\#\$\%\^\&\*\(\)\-\\\\=\+\{\}\[\]\']{2,40}" required>
<input type="submit">
</form>
I would like to add quotes to the allowed in the regex expression, however \"
does not work and " does not work, either...