function Init()
{
	var mittelwaende_link = document.getElementById('mittelwaende_link');
	var mittelwaende = document.getElementById('mittelwaende');
		
	mittelwaende_link.onmouseover = function(){document.getElementById('mittelwaende').style.visibility = 'visible';}
	mittelwaende_link.onmouseout = function(){document.getElementById('mittelwaende').style.visibility = 'hidden';}
	mittelwaende.onmouseover = function(){this.style.visibility = 'visible';}
	mittelwaende.onmouseout = function(){this.style.visibility = 'hidden';}

}