NS_IMETHOD ShouldRollupOnMouseWheelEvent(nsIWidget *aWidget, PRBool *aShouldRollup) { *aShouldRollup = PR_FALSE; return NS_OK;}
NS_IMETHOD ShouldRollupOnMouseWheelEvent(PRBool *aShouldRollup) { *aShouldRollup = PR_FALSE; return NS_OK;}
  NS_IMETHOD ShouldRollupOnMouseWheelEvent(nsIWidget *aWidget, PRBool *aShouldRollup)   { *aShouldRollup = PR_FALSE; return NS_OK;}