Revert "-- corr"

This reverts commit 5315c47fcd.

Scripts/AjaxControlToolkit/Debug/Slider.debug.js

@@ -624,7 +624,7 @@ Sys.Extended.UI.SliderBehavior.prototype = {
     },
 
     /// <summary>
-    /// Slider drag mode 
+    /// Slider dra mode 
     /// </summary>
     /// <getter>dragMode</getter>
     /// <member name="cP:AjaxControlToolkit.SliderExtender.dragMode" />
@@ -639,6 +639,7 @@ Sys.Extended.UI.SliderBehavior.prototype = {
 
     onDrag: function() {
         var dragHandleBounds = this._getBoundsInternal(this._dragHandle);
+        var handleBounds = this._getHandleBounds();
         var sliderBounds = this._getRailBounds();
 
         var handlePosition;