// JavaScript Document
// show hide layers
function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }	
	}
// show and hide descriptions. use ShowDescription(layername,text); leave text blank to clear layer
function ShowDescription(layer,text) {
	if (!text) text = '&nbsp;';
	
	if (document.all) {
		document.all[layer].innerHTML = text;
	} else if (document.layers) {
		description[layer].write(text);
	} else if (document.getElementById) {
		document.getElementById(layer).innerHTML = text;
	}
}