diff --git a/presentation/lookAndFeel/knowledgeTree/documentmanagement/viewUI.inc b/presentation/lookAndFeel/knowledgeTree/documentmanagement/viewUI.inc
index 1d0aea7..0cbf27b 100644
--- a/presentation/lookAndFeel/knowledgeTree/documentmanagement/viewUI.inc
+++ b/presentation/lookAndFeel/knowledgeTree/documentmanagement/viewUI.inc
@@ -169,6 +169,14 @@ function getEditPage($oDocument) {
         $sToRender .= "<td><a href=\"" . generateControllerLink("checkOutDocument", "fDocumentID=" . $oDocument->getID()) . "\"><img src=\"$default->graphicsUrl/widgets/checkout.gif\" border=\"0\" /></a></td>\n";
     }
     
+    // display the unsubscribe button if the user is subscribed to the document
+    if (Subscription::exists($_SESSION["userID"], $oDocument->getID(), SubscriptionConstants::subscriptionType("DocumentSubscription"))) {
+        $sToRender .= "<td><a href=\"" . generateControllerLink("removeSubscription", "fDocumentID=" . $oDocument->getID()) . "\"><img src=\"$default->graphicsUrl/widgets/unsubscribe.gif\" border=\"0\" /></a></td>\n";
+    // otherwise display the subscribe button
+    } else {
+        $sToRender .= "<td><a href=\"" . generateControllerLink("addSubscription", "fDocumentID=" . $oDocument->getID()) . "\"><img src=\"$default->graphicsUrl/widgets/subscribe.gif\" border=\"0\" /></a></td>\n";
+    }
+    
     $sToRender .= "</tr>\n";
     $sToRender .= "</table>\n";
 
@@ -209,6 +217,15 @@ function getViewPage($oDocument) {
     $sToRender .= "<tr>\n";
     $sToRender .= "<td><a href=\"" . $_SERVER["PHP_SELF"] . "?fDocumentID=" . $oDocument->getID() . "&fForDownload=1\"><img src=\"$default->graphicsUrl/widgets/download.gif\" border=\"0\" /></a></td>\n";
     $sToRender .= "<td><a href=\"" . generateControllerLink("emailDocument", "fDocumentID=" . $oDocument->getID()) . "\"><img src=\"$default->graphicsUrl/widgets/email.gif\" border=\"0\" /></a></td>\n";
+    
+    // display the unsubscribe button if the user is subscribed to the document
+    if (Subscription::exists($_SESSION["userID"], $oDocument->getID(), SubscriptionConstants::subscriptionType("DocumentSubscription"))) {
+        $sToRender .= "<td><a href=\"" . generateControllerLink("removeSubscription", "fDocumentID=" . $oDocument->getID()) . "\"><img src=\"$default->graphicsUrl/widgets/unsubscribe.gif\" border=\"0\" /></a></td>\n";
+    // otherwise display the subscribe button
+    } else {
+        $sToRender .= "<td><a href=\"" . generateControllerLink("addSubscription", "fDocumentID=" . $oDocument->getID()) . "\"><img src=\"$default->graphicsUrl/widgets/subscribe.gif\" border=\"0\" /></a></td>\n";
+    }
+    
     $sToRender .= "</tr>\n";
     $sToRender .= "</table>\n";