function toggle_content(span)
{
	displayType = (document.getElementById('toggle_' + span).style.display == 'none') ? 'block' : 'none';
	document.getElementById('toggle_' + span ).style.display = displayType;
	
	if(document.getElementById('toggle_img_' + span).src == 'http://www.terra-cms.de/images/icons/expand_minus.gif')
	{
		document.getElementById('toggle_img_' + span).src = 'http://www.terra-cms.de/images/icons/expand_plus.gif';
	}
	else
	{
		document.getElementById('toggle_img_' + span).src = 'http://www.terra-cms.de/images/icons/expand_minus.gif';
	}
}