There is no "hide" event for any HTML element in the DOM. How are you "hiding" your elements? Are you using CSS to change the display or visibility?
If you're using display:none to hide an element, you can't detect when CSS changes. In IE, you can detect when a property changes but that doesn't extend to style values. You'll need to throw an event or do whatever the event is doing at the time the CSS display is changed.
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