<select> validation

There are two different attributes that apply only to drop-down lists created created using the <select> tag.

The tmt:invalidindex attribute prevents the user from selecting an entry from a given position (zero based):

<select name="lady" tmt:invalidindex="0">

The tmt:invalidvalue attribute prevents the user from selection an entry with a specific value:

<select name="dish" tmt:invalidvalue="Crepes">

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