var current;

function nav_over(x)
{
	document.getElementById("nav"+x).src="images/green_dot.gif";
}
function nav_out(x)
{
	if (x!=current)
	{
	document.getElementById("nav"+x).src="images/lightgreen_dot.gif";
	}
}
function nav_clicked(x)
{
	current=x;
	nav_out(1);
	nav_out(2);
	nav_out(3);
	nav_out(4);
	nav_out(5);
	nav_out(6);
	nav_over(x);
	subnav_clear();
	document.getElementById("subnav1").style.visibility="hidden";
	document.getElementById("subnav2").style.visibility="hidden";
	document.getElementById("subnav4").style.visibility="hidden";
	if ((x==1)||(x==2)||(x==4))
	{
	document.getElementById("subnav"+x).style.visibility="visible";
	subnav_clicked(x+"_1");
		if (x==1) {parent.mainFrame.location.href="content_news.asp";}
		if (x==2) {parent.mainFrame.location.href="content_fahrten.htm";}
		if (x==4) {parent.mainFrame.location.href="content_vorstellung.htm";}
	}
	else
	{	
		if (x==3) {parent.mainFrame.location.href="content_anreise.htm";}
		if (x==5) {parent.location.href="https://www.studio-server.info/eshop/baltrum-linie";}		
		if (x==6) {parent.mainFrame.location.href="content_kontakt.htm";}
	}
}

function subnav_clear()
{
	document.getElementById("subnav1_1").style.color="#FFFFFF";
	document.getElementById("subnav1_2").style.color="#FFFFFF";
	document.getElementById("subnav2_1").style.color="#FFFFFF";
	document.getElementById("subnav2_2").style.color="#FFFFFF";
	document.getElementById("subnav4_1").style.color="#FFFFFF";
	document.getElementById("subnav4_2").style.color="#FFFFFF";
	document.getElementById("subnav4_3").style.color="#FFFFFF";
	document.getElementById("subnav4_4").style.color="#FFFFFF";
}

function subnav_clicked(x)
{
	subnav_clear();
	document.getElementById("subnav"+x).style.color="#00A77E";
}