class LinksTable extends Page {

static $many_many = array(
'LinksTable1' => Links',
);

function getCMSFields() {
$fields = parent::getCMSFields();

$LinksTable1tablefield = new ManyManyComplexTableField(
$this,
'LinksTable1',
'Links',
array(
'LinkName' => 'Link Name',
'LinkTitle' => 'Link Title',
'LinkLocation' => 'Link URL',
'LinkColumnName' => 'Link Column'
),
'getCMSFields_forPopup'
);
$LinksTable1tablefield->setAddTitle( 'New Link' );
$LinksTable1tablefield->setPageSize(25);

return $fields;
}

}

class Links extends DataObject {
static $db = array(
'LinkName' => 'Text',
'LinkTitle' => 'Text',
'LinkLocation' => 'Text',
'LinkColumn' => 'Int'
);

static $has_one = array(
);

static $belongs_many_many = array(
'LinksTable1' => 'LinksTable'
);

function getCMSFields_forPopup() {
$options = array('1'=>'Column One','2'=>'Column 2','3'=>'Column 3');

$fields = new FieldSet();
$fields->push( new TextField( 'LinkName', 'Link Name' ) );
$fields->push( new TextField( 'LinkTitle', 'Link Title' ) );
$fields->push( new TextField( 'LinkLocation', 'Link URL' ) );
$fields->push( new DropdownField('LinkColumn', 'Link Column', $options));
return $fields;
}

function getLinkColumnName() {
return "test";
}

}