<% form_tag do %> <p> <label for="name">Name:</label> <%= text_field_tag :name, params[:name] %> </p>
<p> <label for="password">Password:</label> <%= password_field_tag :password, params[:password] %> </p> <p><%= submit_tag "Login" %></p> <% end %>
This sends params[:name] and params[:password] that you can use in your controller.
Passing multiple parameters is what a form does. 
You're over-
thinking it.
Also notice that you use <% form_tag ... %> NOT <%= form_tag... %>. No equal sign. You end the form with <% end %>.
