Dropshadow filter and rollout

here is my code applied on the frame 1 actionscript.
it supposed to dropa shadow over the map pf movieclip “canada”.It does!.
now i would like to know how to make this shadow GONE on Rollout???

import flash.filters.DropShadowFilter;
canada.onRollOver= function() {
var filter:DropShadowFilter = new DropShadowFilter(5, 5, 0x000000, 0.8,5, 5, 1, 3, false, false, false);
var filterArray:Array = new Array();
this.filters = filterArray;
[COLOR=red] canada.onRollOut= function(): Void { --is wrong…

got it.

canada.onRollOut = function() {