check = 0;
old_item = 0;

function menu_on_off(layer, this_item)
{
	if(document.all)
	{
		if(old_item != this_item)
		{
			document.all.m1.style.display = "none";
			document.all.m2.style.display = "none";
			document.all.m3.style.display = "none";
			document.all.m4.style.display = "none";
			document.all.m5.style.display = "none";
			document.all.m6.style.display = "none";
			document.all.m7.style.display = "none";
			document.all.m8.style.display = "none";
			document.all[layer].style.display = "block";	
			check = 1; old_item = this_item;
		}
		else if(old_item == this_item)
		{
			document.all[layer].style.display = "none";	
			check = 0; old_item = 0;
		}
	}
	else if(document.getElementById)
	{
		if(old_item != this_item)
		{
			document.getElementById['m1'].style.display = "none";
			document.getElementById['m2'].style.display = "none";
			document.getElementById['m3'].style.display = "none";
			document.getElementById['m4'].style.display = "none";
			document.getElementById['m5'].style.display = "none";
			document.getElementById['m6'].style.display = "none";
			document.getElementById['m7'].style.display = "none";
			document.getElementById['m8'].style.display = "none";
			document.getElementById[layer].style.display = "block";	
			check = 1; old_item = this_item;
		}
		else if(old_item == this_item)
		{
			document.getElementById[layer].style.display = "none";	
			check = 0; old_item = 0;
		}
	}
}

function menu_link_color(link_name)
{
	document.all.a1.style.color = "yellow";
	document.all.a2.style.color = "yellow";
	document.all.a3.style.color = "yellow";
	document.all.a4.style.color = "yellow";
	//document.all.a5.style.color = "yellow";
	document.all.a6.style.color = "yellow";
	//document.all.a7.style.color = "yellow";
	document.all.a8.style.color = "yellow";
	document.all.a9.style.color = "yellow";
	document.all.a10.style.color = "yellow";
	document.all.a11.style.color = "yellow";
	document.all.a12.style.color = "yellow";
	//document.all.a13.style.color = "yellow";
	document.all[link_name].style.color = "white";	
}

function opdater_menu()
{
	top.left.document.all.a4.style.color="yellow";
	top.left.document.all.a3.style.color="white";
	top.left.document.all.m1.style.display = "none";
	top.left.document.all.m2.style.display = "none";
	top.left.document.all.m3.style.display = "none";
	top.left.document.all.m4.style.display = "none";
	top.left.document.all.m5.style.display = "none";
	top.left.document.all.m6.style.display = "none";
	top.left.document.all.m7.style.display = "none";
	top.left.document.all.m8.style.display = "none";
	top.left.document.all.m2.style.display = "block";
}
function opdater_menu_2_skal_rettes()
{
	top.left.document.all.a4.style.color="yellow";
	top.left.document.all.a6.style.color="white";
}

dyrevelfaerd = new Array(2)
dyrevelfaerd[0] = "gfx/okologi/dyrevelfaerd1.jpg";
dyrevelfaerd[1] = "gfx/okologi/dyrevelfaerd2.jpg";

sundhed = new Array(2)
sundhed[0] = "gfx/okologi/sundhed1.jpg";
sundhed[1] = "gfx/okologi/sundhed2.jpg";

madvogn = new Array(3)
madvogn[0] = "gfx/madvogn/madvogn1.jpg";
madvogn[1] = "gfx/madvogn/madvogn2.jpg";
madvogn[2] = "gfx/madvogn/madvogn3.jpg";

forside = new Array(2)
forside[0] = "gfx/forside/forside2.jpg";
forside[1] = "gfx/forside/forside3.jpg";

function vis_billede(_array)
{
	document.images.billede.src = eval(_array + "[Math.floor(Math.random() *" +  _array + ".length)]");
}