Adding data to database

Hi there, I am new in wordpress plugin writing but have managed to get a lot of stuff done already.

I have one question regarding to adding data to the database.

I have a form on one of my admin subpages:

<form id="addgal" action="" method="post">

        <input type="text" name="title"/>

        <input type="text" name="description"/>

        <input name="submit" type="submit" id="submit" value="Add" />
        </form>

and a function to add the contents of these fields into the database:

function add_album() {

		global $wpdb;

		$sql = "INSERT INTO " . $wpdb->prefix . "gallery
                  (id, title, description) VALUES (
                  '" . $wpdb->insert_id . "',
                  '" . $wpdb->escape($_POST['title']) . "',
                  '" . $wpdb->escape($_POST['description']) . "'
                  )";

        $wpdb->query($sql);		

	}

But i am having a really hard time to make sure the form passes the data to this function, i’ve tried all sorts of url’s in the form action field but I cant seem to make it work. Maybe i’m just plain stupid or misunderstanding how wordpress handles this, but i’d appreciate some directions 🙂

Thanks!