openproject/app/views/issue_relations/_form.html.erb

<%= error_messages_for 'relation' %>

<p>
  <%= f.select :relation_type, collection_for_relation_type_select, {}, :onchange => "setPredecessorFieldsVisibility();" %>
  <%= l(:label_issue) %> #<%= f.text_field :issue_to_id, :size => 10 %>
  <div id="related_issue_candidates" class="autocomplete"></div>
  <%= javascript_tag "observeRelatedIssueField('#{issues_auto_complete_path(:id => @issue, :project_id => @project, :escape => false) }')" %>
  <span id="predecessor_fields" style="display:none;">
    <%= l(:field_delay) %>: <%= f.text_field :delay, :size => 3 %> <%= l(:label_day_plural) %>
  </span>
  <%= submit_tag l(:button_add) %>
  <%= toggle_link l(:button_cancel), 'new-relation-form'%>
</p>

<%= javascript_tag "setPredecessorFieldsVisibility();" %>