Dynamic repeating checkboxes - select all

[ColdFusion Developer-2]

I have dynamic checkboxes in a Repeater.

I want to create a button for Select All and Clear All that will select each checkbox and clear each checkbox respectively.

I'm hitting a wall.

Here's the checkbox code:

<mx:Button id="subCatButtonSelect" label="Select All" click="selectAll();" />

<mx:Repeater id="subCategoryPickerList">
<mx:CheckBox id="subCategoryCheckbox" data="{subCategoryPickerList.currentItem.subCategoryID}" label="{subCategoryPickerList.currentItem.name}" width="175" />
</mx:Repeater>

Here's what I have for Select All, which is currently not working:

private function selectAll():void {
var idx:int;
var len:int = subCategory.length;
for (idx=0; idx<len; idx++) {
subCategoryCheckbox[idx].selected = true;
}
}

"subCategory" is an ArrayCollection supplying the data for each checkbox.

All help is appreciated! Thanks so much!

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