checkboxes with the same name!!!??

[Mih_Flyer]

hello,

if i have many checkboxes with the same name but different values,,,like this:

<form method="post" action="order.php">
<input type="checkbox" name="cart" value="123.com">
<input type="checkbox" name="cart" value="123.org">
<input type="checkbox" name="cart" value="123.net">
<input type="checkbox" name="cart" value="123.biz">
<input type="submit" name="b1" value="buy now">
</form> 

now when i submit the form, i want to print only the checked items,, note that all of them have the same name,,,please help

thanx alot...