try this:
foreach(glob('../galleri/galleri/*', GLOB_ONLYDIR) as $key=$dirname)
{
$table.=($count%1==0)?"</tr>\n<tr>\n":"";
$table.="<td>".basename($dirname)."</td><td><input type='checkbox'
name ='deldir[$key]' value='$dirname'></td>\n";
$count++;
}
and if it wont work try :
print_r($_POST);
to check what is wrong