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="Unique Image" />\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
}

// generate Insert into headline button
function headline_image_add_button()
{
	elements = document.getElementById('media-items');
	
	// Media upload window is opened
	if (elements)
	{
		children = elements.childNodes;
		
		// create buttons in these elements
		for (var i=0; i < children.length; i++)
		{
			if (children[i].nodeName == 'DIV')
			{
				// get ID of object
				pattern_id = /[0-9]+/;
				id = children[i].id.match(pattern_id);
				
				parent_element = document.getElementById('del_attachment_' + id).parentNode;
				
				// get thumbnail
				thumb = document.getElementById('media-item-' + id).childNodes[0].src;
						
				// create button
				button = document.createElement('input');
				button.setAttribute('type', 'submit');
				button.setAttribute('value', 'Insert as Unique Image');
				button.setAttribute('name', 'headline_image');
				button.setAttribute('class', 'button');
				button.setAttribute('id', 'headline_image_' + i);
				
				try
				{
					// fix for IE6/7
					button.attachEvent('onclick', new Function('headline_image_add(' + id + ', \'' + thumb + '\')'));
				}
				catch (e)
				{
					button.setAttribute('onclick', 'headline_image_add(' + id + ', \'' + thumb + '\')');
				}
				
				// insert button after "Insert into Post" button
				parent_element.insertBefore(button, parent_element.childNodes[1]);
			}
		}
	}
	
	return false;
}
window.onload = headline_image_add_button;// add buttons, if Media upload window is opened