Rails - Mar 2006 - start_form_tag how to use the options parameter ?

Hello, I don''t understand how to use the options parameter of 
start_form_tag
I want to have the class and id attributes of the form initialized to 
"Foo"...

I suppose it''s something like
start_form_tag( :options[''class''] =>
''Foo'', :options[''id''] =>
''Foo'')

But I can''t figure out the right syntax...



Thank you in advance...


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Got it :
<%= start_form_tag( {}, {:class => ''Foo''}) %>

But why do I need to provide an empty {} (empty list ? empty collectin ? 
empty array ? what is this ?) ?

I tought that the order of the parameters was not important as long as 
there have a name ?

So
<%= start_form_tag( options = {:class => ''Foo''}) %>

does not work - why ??

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