diff --git a/app/helpers/todos_helper.rb b/app/helpers/todos_helper.rb
index 6a2762d7..9cf5c3eb 100644
--- a/app/helpers/todos_helper.rb
+++ b/app/helpers/todos_helper.rb
@@ -64,7 +64,7 @@ module TodosHelper
         :complete => todo_stop_waiting_js(todo))
     end
   end
-
+  
   def todo_start_waiting_js(todo)
     return "$('#ul#{dom_id(todo)}').css('visibility', 'hidden'); $('##{dom_id(todo)}').block({message: null})"
   end
diff --git a/app/models/todo.rb b/app/models/todo.rb
index 55044f48..0eb9be78 100644
--- a/app/models/todo.rb
+++ b/app/models/todo.rb
@@ -115,6 +115,12 @@ class Todo < ActiveRecord::Base
     end
   end
   
+  def remove_predecessor(predecessor)
+    # remove predecessor and activate myself
+    predecessors.delete(predecessor)
+    self.activate!
+  end
+  
   # Returns true if t is equal to self or a successor of self
   def is_successor?(t)
     if self == t
diff --git a/app/views/todos/_successor.html.erb b/app/views/todos/_successor.html.erb
index 327dc81c..82d74f56 100644
--- a/app/views/todos/_successor.html.erb
+++ b/app/views/todos/_successor.html.erb
@@ -10,11 +10,15 @@ parameters += "&_tag_name=#{@tag_name}" if @source_view == 'tag'
   <div id="<%= dom_id(successor, 'successor_line') %>">
     <div class="description<%= staleness_class( successor ) %>" style="margin-left: 20px">
       <span class="todo.descr"><%= h sanitize(successor.description) %></span>
-      <a class="remove_successor" style="background: transparent;"
-         href="#"
-         title="remove the successor '<%= successor.description %>'"><%= image_tag( "blank.png",
-          :title => "Remove the successor",
-          :class=>"delete_item") %></a>
+      
+      <%= link_to_remote(
+        image_tag("delete_off.png", :mouseover => "delete_on.png", :alt => "Remove the dependency", :align => "absmiddle"),
+        :url => {:controller => 'todos', :action => 'remove_predecessor', :id => successor.id},
+      :method => 'delete',
+      :with => "'#{parameters}&predecessor=#{predecessor.id}'",
+      :before => todo_start_waiting_js(dom_id(successor, 'successor')),
+      :complete => todo_stop_waiting_js) %>
+      
       <%= render(:partial => "todos/toggle_successors", :locals => { :item => successor, :suppress_button => true }) unless successor.pending_successors.empty? %>
     </div>
   </div>
diff --git a/app/views/todos/_toggle_successors.html.erb b/app/views/todos/_toggle_successors.html.erb
index a0a8883f..47efc3df 100644
--- a/app/views/todos/_toggle_successors.html.erb
+++ b/app/views/todos/_toggle_successors.html.erb
@@ -8,7 +8,8 @@ suppress_button ||= false
              :collection => item.pending_successors,
              :locals => { :todo => item,
                           :parent_container_type => parent_container_type, 
-                          :suppress_dependencies => true }
+                          :suppress_dependencies => true,
+                          :predecessor => item }
   %>
 </div>
 
diff --git a/app/views/todos/add_predecessor.js.rjs b/app/views/todos/add_predecessor.js.rjs
index 2d1f5c0c..714a5956 100644
--- a/app/views/todos/add_predecessor.js.rjs
+++ b/app/views/todos/add_predecessor.js.rjs
@@ -3,24 +3,24 @@ if @saved
   status_message = "Added #{@predecessor.description} as dependency."
   unless @original_state == 'pending'
     status_message += " #{@todo.description} set to pending"
-    # remove successor from page
-    page[@todo].remove
-    # regenerate predecessor to add arrow
-    page[@predecessor].replace_html :partial => 'todos/todo', :locals => { :todo => @predecessor, :parent_container_type => parent_container_type }
-
-    # show in tickler box in project view
-    if source_view_is_one_of :project, :tag
-      page['tickler-empty-nd'].hide
-      page.replace "tickler", :partial => 'todos/deferred', :locals =>  { :deferred => @todo.project.deferred_todos, 
-                                                                          :collapsible => false, 
-                                                                          :append_descriptor => "in this project", 
-                                                                          :parent_container_type => 'project', 
-                                                                          :pending => @todo.project.pending_todos }
-    end
-
-    page << "TodoBehavior.enableToggleNotes();"
-    page << "TodoBehavior.enableToggleSuccessors();"
   end
+  # remove successor from page
+  page[@todo].remove
+  # regenerate predecessor to add arrow
+  page[@predecessor].replace_html :partial => 'todos/todo', :locals => { :todo => @predecessor, :parent_container_type => parent_container_type }
+
+  # show in tickler box in project view
+  if source_view_is_one_of :project, :tag
+    page['tickler-empty-nd'].hide
+    page.replace "tickler", :partial => 'todos/deferred', :locals =>  { :deferred => @todo.project.deferred_todos, 
+                                                                        :collapsible => false, 
+                                                                        :append_descriptor => "in this project", 
+                                                                        :parent_container_type => 'project', 
+                                                                        :pending => @todo.project.pending_todos }
+  end
+
+  page << "TodoBehavior.enableToggleNotes();"
+  page << "TodoBehavior.enableToggleSuccessors();"
   page.notify :notice, status_message, 5.0
 else
   page.replace_html "status", content_tag("div", content_tag("h2", "Unable to add dependency"), "id" => "errorExplanation", "class" => "errorExplanation")  
diff --git a/app/views/todos/remove_predecessor.js.rjs b/app/views/todos/remove_predecessor.js.rjs
new file mode 100644
index 00000000..02cb8364
--- /dev/null
+++ b/app/views/todos/remove_predecessor.js.rjs
@@ -0,0 +1,21 @@
+if @removed
+  status_message = "Removed #{@successor.description} as dependency from #{@predecessor.description}."
+  page.notify :notice, status_message, 5.0
+  
+  # replace old predecessor with one without the successor
+  page.replace dom_id(@predecessor), :partial => 'todos/todo', :locals => { 
+    :todo => @predecessor, :parent_container_type => parent_container_type }
+ 
+  # if possible, remove successor from pending block
+  # TODO: do not remove when multiple dependencies
+  page[@successor].remove unless source_view_is :context
+
+  # if possible, add successor
+  container = "c#{@successor.context_id}items" 
+  container = "p#{@successor.project_id}items" if source_view_is :project
+  page.insert_html :bottom, container, :partial => 'todos/todo', :locals => { 
+    :todo => @successor, :parent_container_type => parent_container_type }
+  page << "TodoBehavior.enableToggleSuccessors()"
+else
+  page.notify :error, "There was an error removing the dependency", 8.0
+end