// JavaScript Document

<!-- hide script from old browsers

var type = "IE";	//Variable used to hold the browser name
var agt=navigator.userAgent.toLowerCase();
BrowserSniffer();

//detects the capabilities of the browser
function BrowserSniffer() {
	if (navigator.userAgent.indexOf("Opera")!=-1 && document.getElementById) type="OP";		//Opera
	else if (document.all) type="IE";														//Internet Explorer e.g. IE4 upwards
	else if (document.layers) type="NN";													//Netscape Communicator 4
	else if (!document.all && document.getElementById) type="MO";							//Mozila e.g. Netscape 6 upwards
	else if (agt.indexOf("safari") != -1) type="SF";							            //Safari
	else type = "IE";		//I assume it will not get here
}

function ShowLayer(id, action){
	if (type=="IE") eval("document.all." + id + ".style.display='" + action + "'");
	if (type=="NN") eval("document." + id + ".display='" + action + "'");
	if (type=="MO" || type=="OP" || type=="SF") eval("document.getElementById('" + id + "').style.display='" + action + "'");

}

function visiLayer(id, action){
	if (type=="IE") eval("document.all." + id + ".style.visibility='" + action + "'");
	if (type=="NN") eval("document." + id + ".visibility='" + action + "'");
	if (type=="MO" || type=="OP" || type=="SF") eval("document.getElementById('" + id + "').style.visibility='" + action + "'");

}

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

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

function hideLayer(id) {
  var lyr = getElemRefs(id);
  if (lyr && lyr.css) lyr.css.display = "none";
}

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

// end hiding script from old browsers -->