Search Form

Hi All
this is driving me batty.
I am trying to do a search, the form I have created has radio buttons
and a text field

_full_search.rhtml

Staff Number<%= radio_button_tag(:search,:staff,0) %> NI Number<%= radio_button_tag(:search, :staff, 1) %> File Number<%= radio_button_tag(:search, :staff, 2) %> name<%= radio_button_tag(:search, :staff, 3) %>

<%= text_field(:search_text, "", "size"=>10)%>

The controller should then check which button is checked and search as
appropriate, there is placeholder text for this as the moment as no
matter which button I check, I always get the same output!
help!
controller
def staff_search
@search_text = params[:search]
@word = params[:search_text]
if @search_text = “staff0”
@word = 1
if @search_text = “staff1”
@word = 2
if @search_text = “staff2”
@word = 3
else @word = 2
end
end
end
end