pmaTooltip(): no return value, additional check

ChangeLog

@@ -8,6 +8,7 @@ $Source$
 2005-11-14 Sebastian Mendel <cybot_tm@users.sourceforge.net>
     * themes/*/css/theme_right.css.php, css/phpmyadmin.css.php:
       bug #1342683 Wrong URL to error.ico
+    * libraries/tooltip.js: no return value, additional check
 
 2005-11-13 Michal Čihař  <michal@cihar.com>
     * Documentation.html, config.default.php, main.php, server_links.inc.php,

libraries/tooltip.js

@@ -127,7 +127,7 @@ function moveTooltip(posX, posY) {
  *
  * @param    string    theText    tooltip content
  */
-function pmaTooltip(theText) {
+function pmaTooltip( theText ) {
     // reference to TooltipContainer
     if ( null == myTooltipContainer ) {
         if (ttNS4) {
@@ -137,7 +137,11 @@ function pmaTooltip(theText) {
         } else if (ttDOM) {
             myTooltipContainer = document.getElementById('TooltipContainer');
         } else {
-            return false;
+            return;
+        }
+
+        if ( typeof( myTooltipContainer ) == 'undefined' ) {
+            return;
         }
     }