-- corr

Scripts/AjaxControlToolkit/Debug/CascadingDropDown.debug.js

@@ -129,6 +129,14 @@ Sys.Extended.UI.CascadingDropDownBehavior = function(e) {
     /// <member name="cP:AjaxControlToolkit.CascadingDropDown.enableAtLoading" />
     this._enableAtLoading = false;
 
+    /// <summary>
+    /// Always clear selected item when parent value changes.
+    /// </summary>
+    /// <getter>get_clearSelectedItemOnParentChange</getter>
+    /// <setter>set_clearSelectedItemOnParentChange</setter>
+    /// <member name="cP:AjaxControlToolkit.CascadingDropDown.clearSelectedItemOnParentChange" />
+    this._clearSelectedItemOnParentChange = false;
+
     // Variables
     this._parentElement = null;
     this._changeHandler = null;
@@ -329,7 +337,7 @@ Sys.Extended.UI.CascadingDropDownBehavior.prototype = {
             }
         }
         else {
-            if(list && (Sys.Browser.agent !== Sys.Browser.Safari) && (Sys.Browser.agent !== Sys.Browser.Opera)) {
+            if(list && (Sys.Browser.agent !== Sys.Browser.Firefox) && (Sys.Browser.agent !== Sys.Browser.Safari) && (Sys.Browser.agent !== Sys.Browser.Opera)) {
                 // Fire the onchange event for the control to notify any listeners of the change
                 if(document.createEvent) {
                     var onchangeEvent = document.createEvent('HTMLEvents');
@@ -372,6 +380,9 @@ Sys.Extended.UI.CascadingDropDownBehavior.prototype = {
         // "evt" - set by the browser when called as an event handler (unused here)
         // "inInit" - whether this is being called from the initialize method
 
+        if(this.get_clearSelectedItemOnParentChange())
+            this.set_selectedValue('', '');
+
         var e = this.get_element();
 
         // Create the known category/value pairs string for sending to the helper web service
@@ -715,6 +726,16 @@ Sys.Extended.UI.CascadingDropDownBehavior.prototype = {
         }
     },
 
+    get_clearSelectedItemOnParentChange: function() {
+        return this._clearSelectedItemOnParentChange;
+    },
+    set_clearSelectedItemOnParentChange: function(value) {
+        if(this._clearSelectedItemOnParentChange != value) {
+            this._clearSelectedItemOnParentChange = value;
+            this.raisePropertyChanged('clearSelectedItemOnParentChange');
+        }
+    },
+
     /// <summary>
     /// Fires when selection is changed.
     /// </summary>