Hi Nick, no this has nothing to do with the mouse down layer. In fact as I've often said before I don't know if the mouse down layer really has much use these days.
A mouse over layer, by altering the state of a button, indicates that it is a button and pressing it will lead to an action. Normally on an html page that means it loads another page. I'm not sure a mouseDown action prior to a complete page change is worth the effort in todays rapidly speeding up internet.
So that's enough waffle. How do you get your mouseOver graphic to stay once clicked. Under normal circumstances you can't because on click it loads a whole new page (unless your using a swf nav bar). Therefore what you need to do is to create a layer named "selected" on each page, such that it sits above the normal mouseOff mouseOver layers and hides those buttons. Just move the selected graphic & text to cover the relevant button for each page.
Don't know if this attachment helps or not.
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