insert array values

I've been racking my little peanut-brain as well as big Google with little hope... I can retrieve the array from the multiple select dropdown box but I can't quite manage to insert the data which is just id numbers for a table. I've tried some while stuff but doesn't work. I know I don't have the right syntax on anything at this point. Here's an effort that doesn' work. Dont know if I should be using $categoriesIN[] type of stuff... but my tries were from web illustrations... the outcommented line returns the values of the array... but how to pass them to the query? foreach ($categoriesIN as $category) { //"$category<br>"; $sql = "INSERT INTO book_categories ( book_id, category ) VALUES( book.id WHERE title = $titleIN, $category )"; $result = mysql_query($query, $db);; } TIA -- unheralded genius: "A clean desk is the sign of a dull mind. " ------------------------------------------------------------- Phil Jourdan --- pj@ptahhotep.com http://www.ptahhotep.com http://www.chiccantine.com/andypantry.php