/* Steuerung der Drop Down Menüs */

function allhidden()
	{window.document.getElementById("navi_p").style.visibility="hidden";
	window.document.getElementById("navi_a").style.visibility="hidden";
	window.document.getElementById("navi_t").style.visibility="hidden";
	window.document.getElementById("navi_ne").style.visibility="hidden";}
	
function navi_p_visible()
	{window.document.getElementById("navi_p").style.visibility="visible";
	window.document.getElementById("navi_a").style.visibility="hidden";
	window.document.getElementById("navi_t").style.visibility="hidden";}

function navi_a_visible()
	{window.document.getElementById("navi_p").style.visibility="hidden";
	window.document.getElementById("navi_a").style.visibility="visible";
	window.document.getElementById("navi_t").style.visibility="hidden";}

function navi_t_visible()
	{window.document.getElementById("navi_p").style.visibility="hidden";
	window.document.getElementById("navi_a").style.visibility="hidden";
	window.document.getElementById("navi_t").style.visibility="visible";}

	
function navi_news_visible()
	{window.document.getElementById("navi_ne").style.visibility="visible";
	window.document.getElementById("navi_p").style.visibility="hidden";
	window.document.getElementById("navi_a").style.visibility="hidden";
	window.document.getElementById("navi_t").style.visibility="hidden";}