Renamed type.properties according to prototype naming scheme recently introduced in Helma (s. http://helma.org/bugs/show_bug.cgi?id=533)

code/HopObject/HopObject.js

@@ -87,7 +87,7 @@ HopObject.prototype.delete_action = function() {
 
    res.data.action = this.href(req.action);
    res.data.title = gettext("Confirm deletion of " + this);
-   res.data.body = this.renderSkinAsString("delete", {
+   res.data.body = this.renderSkinAsString("HopObject#delete", {
       text: gettext('You are about to delete {0}.', this)
    });
    res.handlers.site.renderSkin("page");

code/HopObject/HopObject.skin

@@ -1,3 +1,4 @@
+<% #delete %>
 <form action="<% response.action %>" method="post">
 <p class="storyTitle">Warning!</p>
 <p><% param.text %></p>