multiple select skal kunne give alle options adskilt af komma

<?php
echo implode(',', $_POST['ansvarlig']);
?>
<form method="post">
<select name="ansvarlig[]" size="4" multiple="multiple" tabindex="1">
<option value="7" selected="selected">1</option>
<option value="8" selected="selected">2</option>
<option value="11" selected="selected">3</option>
<option value="1">4</option>
</select>
<input type="submit" value="submit" name="gem" />
</form>

den siger invalid arguments passed :(

så virker det .. havde ikke set [] .. tak :)

smid svar!

ILD.