if (document.getElementById){
  document.write('<style type="text/css">\n')
  document.write('.menusecun{display: none;}\n')
  document.write('</style>\n')
}
function SwitchMenu(obj){
	if(document.getElementById){
	var el = document.getElementById(obj);
	var ar = document.getElementById("masterdiv").getElementsByTagName("span");
		if(el.style.display != "block"){
			for (var i=0; i<ar.length; i++){
				if (ar[i].className=="menusecun")
				ar[i].style.display = "none";
			}
			el.style.display = "block";
		}else{
			el.style.display = "none";
		}
	}
}
function hideImage(obj){
  var el = document.getElementById(obj);
  var images = document.getElementById("masterdiv").getElementsByTagName("img");
  for(var i=0; i<images.length;i++){
    images[i].src = "/tridown.gif";
  }
  el.src="/tri.gif";
}