AJAX form Parameters jumbled

Sorry for the repost but I originally posted this as a response to
another thread. I have a text field called ‘phrase’ but the
parameter values always come up as nil and when I check the
parameters dumped in the error message I do not get the normal hash
you’d expect. Instead of something like

{“phrase”=>“jim”}

I get:

{“jim”=>"", “_”=>""}

Here is the code for the form: