Bug 146598. Disable Search button until we have entered text. Patch by Stephen Walker <walk84@yahoo.com> r=oeschger, sr=alecf

extensions/help/resources/content/help.js

@@ -545,6 +545,12 @@ function doFind() {
   searchTree.builder.rebuild();
 }
 
+function doEnabling() {
+  var findButton = document.getElementById("findButton");
+  var findTextbox = document.getElementById("findText");
+  findButton.disabled = !findTextbox.value;
+}
+
 function clearDatabases(compositeDataSource) {
   var enumDS = compositeDataSource.GetDataSources()
   while (enumDS.hasMoreElements()) {

extensions/help/resources/content/help.xul

@@ -225,9 +225,10 @@
                 <hbox align="center">
                   <textbox id="findText" 
                      flex="1" 
+                     oninput="doEnabling();"
                      onkeypress="if (event.keyCode == KeyEvent.DOM_VK_ENTER || event.keyCode == KeyEvent.DOM_VK_RETURN) doFind();"/>
 
-                  <button id="findButton" default="true" label="&gobtn.label;" oncommand="doFind()" flex="0"/>
+                  <button id="findButton" default="true" disabled="true" label="&gobtn.label;" oncommand="doFind()" flex="0"/>
                 </hbox>
                 <tree id="help-search-tree"
                       flex="1" hidecolumnpicker="true"