//Search the category items
var categorySearch = search.create({
	type: search.Type.COMMERCE_CATEGORY,
	filters: [{
		name: 'internalid',
		operator: 'anyof',
		values: category
	}],
	columns: [{
		name: 'itemid'
	}]
});

categorySearch.run().each(function(result) {

	var item_id = result[0].getValue({
		name: 'itemid'
	});
	
});