Validate disabled field?

Validate disabled field?

I've got a field which is disabled and is populated through a popup. The user clicks a link, selects a user and the field is populated with that users value.  Since it is disabled they can't manually type a value into it.

I'm using Jorn's validation plugin and am unable to validate that field - nothing happens :\

  1. <input type="text" name="myFieldName" id="myFieldName" value="" disabled="disabled" />

Whats the best way to handle something like that?

Jim