replaceIssueFormWith('<%= escape_javascript(render :partial => 'form') %>');
<% case params[:form_update_triggered_by] %>
<% when "issue_project_id" %>
  $("#watchers_form_container").html('<%= escape_javascript(render :partial => 'issues/watchers_form') %>');
<% when "issue_category_id" %>
  <% if @issue.assigned_to_id.blank? %>
    $('#issue_assigned_to_id').val('<%= @issue.category.try(:assigned_to_id) %>');
  <% end %>
<% end %>