I have a button in a flash movie which has code that executes on rollover. so when I put my mouse over the button, the code executes. but there is a drop down menu which, when it drops down, it goes over this button, when I move my mouse on this drop down menu to where the button is underneath it, the rollover code still executes even though the menu is on top of it. how do I get the rollover code not to execute when the drop down menu is open and on top of the button?