function showPfeil(menu){
			//alert(parent.document.getElementById('menu_pfeil_home').style.display);
			parent.document.getElementById('menu_pfeil_home').style.display		="none";
			parent.document.getElementById('menu_pfeil_struktur').style.display		="none";
			parent.document.getElementById('menu_pfeil_kontakt').style.display		="none";
			parent.document.getElementById('menu_pfeil_impressum').style.display	="none";
			parent.document.getElementById('menu_pfeil_'+menu).style.display		="block";
		}
		
function showContent(menu){
			//alert(menu);
			location.href=menu+'.html#top';
		}
		
		
function changeStrukturHeight(height) {
			parent.document.getElementById('struktur').style.height	= height;
}