--- loncom/html/res/adm/pages/bookmarkmenu/bookmarklib.js	2001/12/19 17:21:28	1.19
+++ loncom/html/res/adm/pages/bookmarkmenu/bookmarklib.js	2003/06/23 19:03:33	1.20
@@ -1,7 +1,7 @@
 // The LearningOnline Network with CAPA
 // bookmarklib.js
 // 
-// $Id: bookmarklib.js,v 1.19 2001/12/19 17:21:28 albertel Exp $
+// $Id: bookmarklib.js,v 1.20 2003/06/23 19:03:33 www Exp $
 // 
 // Copyright Michigan State University Board of Trustees
 // 
@@ -348,7 +348,11 @@ function folderHover(image_num) {
       if (window.tree.cache.lastImg==-2) {
 	frames[7].document.images[1].src='/res/adm/pages/bookmarkmenu/folder_trash.gif';
       } else {
-	frames[4].document.images[window.tree.cache.lastImg].src=window.tree.cache.icon;
+          if (typeof(window.tree.cache.lastImg)!='undefined') {
+             if (window.tree.cache.lastImg>=0) {
+                frames[4].document.images[window.tree.cache.lastImg].src=window.tree.cache.icon;
+             }
+          }
       }
       window.tree.cache.lastImg=image_num;
       window.tree.cache.icon=this.icon;
@@ -447,7 +451,11 @@ function linkHover(img_num) {
       if (window.tree.cache.lastImg==-2) {
          frames[7].document.images[1].src='/res/adm/pages/bookmarkmenu/folder_trash.gif';
       } else {
+         if (typeof(window.tree.cache.lastImg)!='undefined') {
+            if (window.tree.cache.lastImg>=0) {
 	 frames[4].document.images[window.tree.cache.lastImg].src=window.tree.cache.icon;
+            }
+         }
       }
       window.tree.cache.lastImg=img_num;
       window.tree.cache.icon=this.icon;
@@ -528,8 +536,12 @@ function clickTrash() {
 }
 
 function hoverTrash() {
-   if (window.tree.cache.isLoaded) {
-      frames[4].document.images[window.tree.cache.lastImg].src=window.tree.cache.icon;
+   if (window.tree.cache.isLoaded) {         
+      if (typeof(window.tree.cache.lastImg)!='undefined') {
+         if (window.tree.cache.lastImg>=0) {
+            frames[4].document.images[window.tree.cache.lastImg].src=window.tree.cache.icon;
+         }
+      }
       window.tree.cache.lastImg=-2;
       window.tree.cache.icon='/res/adm/pages/bookmarkmenu/folder_trash.gif';
       frames[7].document.images[1].src = '/res/adm/pages/bookmarkmenu/folder_trash_hover.gif';