function aufklappen (nummer,bild)
{
	if(document.getElementById("element" + nummer).style.display == "none")
 	{
		var elements = document.getElementsByName("element");
		for(i = 0; i < elements.length;i++)
		{
			elements[i].style.display = "none";
		}
		var pics = document.getElementsByName("pic");
		for(i = 0; i < pics.length;i++)
		{
			pics[i].src = "cmx/ordner/bilder/openButtonHeadline.gif";
		}
		document.getElementById("element" + nummer).style.display = "block";
		bild.src = "cmx/ordner/bilder/closeButtonHeadline.gif";
 	}
	else
	{
		document.getElementById("element" + nummer).style.display = "none";
		bild.src = "cmx/ordner/bilder/openButtonHeadline.gif";
 	}
}