I'm trying to enable/disable a tooltip dynamically (via AJAX) based on the state of a boolean property on my backing bean.

<h:selectOneMenu...>
...
<rich:toolTip id="myTooltip" disabled="#{!backingBean.dirty}" value="test" />
</h:selectOneMenu>

However, whenever I tell the tooltip to reRender, I get a javascript error here (in red):

 stopObserving: function(element, name, observer, useCapture) {
 element = $(element);
 useCapture = useCapture || false;

 if (name == 'keypress' &&
 (Prototype.Browser.WebKit || element.attachEvent))
 name = 'keydown';

 if (element.removeEventListener) {
 element.removeEventListener(name, observer, useCapture);
 } else if (element.detachEvent) {
 try {
 element.detachEvent('on' + name, observer);
 } catch (e) {}
 }
 }
});

The JS error msg is: "Error: 'removeEventListener' is null or not an object"