Magento display configurable attribute values

I need to display, in my homepage, the available colors of a specific configurable product. The availability is based on the stock quantity.

For example, a config. product is associated with these simple producs:

BLACK M --> quantity 5

BLACK S --> quantity 0

BLACK X --> quantity 3

RED M --> quantity 10

RED S --> quantity 25

YELLOW XL --> quantity 0

In this case, I would like to display:

"The available colors: BLACK , RED "

YELLOW is not included because its quantity is 0

I found out this php method to estimate the quantity, but I can't show the colors as I would:

$store = Mage::app()->getStore();

$myconfig = Mage::getModel('catalog/product')->setStoreId($store->getId())->load(21765);

$ids = $myconfig->getTypeInstance()->getUsedProductIds();

foreach ($ids as $id):

$simple = Mage::getModel('catalog/product')->load($id); 

$quantity = (int)Mage::getModel(开发者_运维技巧'cataloginventory/stock_item')->loadByProduct($simple)->getQty();

endforeach;

The $quantity let a conditional check for the displaying, but I need all the following part... thanks a lot guys

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Rik (OP) already self-answered the question.

Quote:

I solved this topic by a Javascript method, thank you

_{Note: It's absolutely OK to self-answer your own question. Please just post it as an real answer, but not in a question or comment. Posting as real answer helps to keep the "Unanswered" list more clear (avoids making other people wasting their time).}