multiple selections in list/menu field

I'm trying to use a list/menu field with multiple options allowed but I'm only getting the very last selection. Here's part of my code to build the list/menu field; print (" <td><select name=\"x[rec_pd4]\" multiple size=\"15\">\n"); print ("$option_pd4"); print (" </select></td>\n"); Here's the code to build the options; $pd4arry = array(array("c1,","Bookpacks & Daypacks"),array("c2,","Mini Packs/Diaper Bag"),array("c3,","Shoulder Bags/Briefcase")); foreach($pd4arry as $value) { if (($value[0] == $category_code) || ($value[0] == $x[rec_pd4])) { $option_pd4 .= " <option value=\"$value[0]\"selected>$value[1]</option>\n"; } else { $option_pd4 .= " <option value=\"$value[0]\">$value[1]</option>\n"; } } The field displays fine but I only get the last option. I'm testing with IE 5. Let me know if this is not a PHP issue but I thought there might be something that would prevent me from using this type of field with PHP. Thanks, Tom