Need help creating simple Select All checkbox

System

I have an incredibly simple task for a DCT form and just can't see why this is not working.

The script is very basic. It is triggered via an init script whenever any checkbox has a state change.
function fnHandleCarType(item) {
var arOptions = item.getOptions();
for (i=0; i<arOptions.length; i++) {
if (arOptions.value == "all") {
if (arOptions.selected) {
var changeState = true;
}
}
if (changeState) {
arOptions.selected=true;
}
}
}

I've used alerts to try to figure out why this doesn't work. And, all I can see right now is that the arOptions.selected change from true/false just doesn't ever happen on the form. I know I must be missing something incredibly obvious but I just don't see it.

I'm using TeamSite 6.7.2.0.

Thank you for any help on this.

Stefanie

Migrateduser

A co-worker fixed. I'm posting here in case anyone else is interested. For something so simple, this just didn't strike me as the fix.

if (changeState) {
item.setValue([0,1,2,3,4,5,6,7,8,9,10]);
}