app/views/links/new.html.erb
<% if params[:layout]=="false" %>
<%= render partial: 'form', layout: 'layouts/modal_form_layout',
locals:{modal_title: "Create new link", submit_text: "Create", submitting_text: "Creating..."} %>
<% else %>
<%= render partial: 'form',
locals:{submit_text: "Create", submitting_text: "Creating..."} %>
<% end %>