cdf4825d_ompatible_with_Mozilla_Firefox_vent_object_properties_methods_Description
[In Explorer] cancelBubble [In Firefox (DOM standard)] The stopPropagation() method of the event should be called. [Description] 
Assigning true to this property prevents the event from con­tinuing propa­gat­ing upwards in the DOM tree.
Making your web page compatible with Mozilla Firefox
Description