function headline_image_add(attachment_id, thumb_url)
{
	mainFrame = parent.window.document;// get main frame
	mainFrame.getElementById('headline_image_value').value = attachment_id;// add image id to hidden form entry
	mainFrame.getElementById('headline_image_show').innerHTML = '<img class="thumbnail" src="' + thumb_url + '" alt="" />\n';// show image
	mainFrame.getElementById('headline_image_remove').style.display = 'block';// show Remove button
	
	// close window
	var win = window.dialogArguments || opener || parent || top;
	win.tb_remove();
}

function headline_image_clear()
{
	document.getElementById('headline_image_value').value = 0;// no image
	document.getElementById('headline_image_show').innerHTML = '';// hide image
	document.getElementById('headline_image_remove').style.display = 'none';// hide Remove button
}