In the hope it helps someone else:
It turns out there's an option for this very thing, it just wasn't in
the wiki-docs (I'm about to go and add it).
You just need to attach a 'callback' to the options hash, that returns
the querystring you want sent to the server, allowing anything else to
be attached to it. Slight gotcha, what you return is used instead of
the defaults, rather than instead of. A quick example- I wanted
selecting a person's name to be further restricted if a company had
already been chosen:
var options = {
callback: function(field,querystring) {
if($F('company_id')) {
typed+='&company_id='+$F('company_id');
}
return querystring;
}
};
Greg
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