function showtables(source_element)
{
	var image = source_element.getElementsByTagName('img')[0];
	var image_name = image.src.substr(image.src.indexOf('images/') + 7);
	var div = source_element.parentNode.getElementsByTagName('div');
	
		if(div[0].style.display == 'none' )
		{
			div[0].style.display = 'block';
			image.src="fileadmin/templates/pics/pfeil_down.gif";
		}
		else 
		{
			div[0].style.display = 'none';
			image.src="fileadmin/templates/pics/pfeil.gif";
		}
	
}