// Javascript for www.miokastellet.se

function externalLinks()
{
	if (!document.getElementsByTagName) return;
	var anchors = document.getElementsByTagName("a");
	for (var i=0; i<anchors.length; i++)
	{
		var anchor = anchors[i];
		if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "external")
		{
			anchor.target = "_blank";
		}
	}
}

var cur_lyr;
var cur_lyr2;

function swapLayers(id)
{
	if (cur_lyr) hideLayer(cur_lyr);
	showLayer(id);
	cur_lyr = id;
}

function swapLayers2(id)
{
	if (cur_lyr2) hideLayer(cur_lyr2);
	showLayer(id);
	cur_lyr2 = id;
}

function showLayer(id)
{
	var lyr = getElemRefs(id);
	if (lyr && lyr.css) lyr.css.visibility = "visible";
}

function hideLayer(id)
{
	var lyr = getElemRefs(id);
	if (lyr && lyr.css) lyr.css.visibility = "hidden";
}

function getElemRefs(id)
{
	var el = (document.getElementById)? document.getElementById(id): (document.all)? document.all[id]: (document.layers)? getLyrRef(id,document): null;
	if (el) el.css = (el.style)? el.style: el;
	return el;
}