Timing a function

[larcho]

How can I delay this function to happen 5 seconds AFTER I rolled my mouse over:

[AS]
on (rollOver) {
_root.mc_fotos.onEnterFrame = function() {
this._x -= ((this._x + 2800) / 4);
}
}
[/AS]

Thanks

[system]

on (rollOver) {
function delay(){
clearInterval(hold);
        _root.mc_fotos.onEnterFrame = function() {
                this._x -= ((this._x + 2800) / 4);
        }
}
hold = setInterval(delay,5000);
}