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-rw-r--r--framework/Web/Javascripts/source/prado/controls/slider.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/framework/Web/Javascripts/source/prado/controls/slider.js b/framework/Web/Javascripts/source/prado/controls/slider.js
index aebf3527..f4c9b2f3 100644
--- a/framework/Web/Javascripts/source/prado/controls/slider.js
+++ b/framework/Web/Javascripts/source/prado/controls/slider.js
@@ -23,7 +23,7 @@ Prado.WebUI.TSlider = Class.extend(Prado.WebUI.PostBackControl,
this.element.stopObserving();
this.track.stopObserving();
this.handle.stopObserving();
- this.progress.stopObserving();
+ if (this.progress) this.progress.stopObserving();
this.hiddenField.stopObserving();
// Will be used to align the handle onto the track, if necessary