if (document.getElementById) { 
document.write('<style type="text/css">\n')
document.write('.submenu{display: none;}\n')
document.write('</style>\n')
}

function SwitchMenu(obj) {
	     if (document.getElementById) {
	     var el = document.getElementById(obj);
	     var ar = document.getElementById("dropdiv").getElementsByTagName("span"); 
	          if (el.style.display != "block") { 
	               for (var i=0; i<ar.length; i++) {
	                    if (ar[i].className=="submenu") 
		       ar[i].style.display = "none";
	               }
	               el.style.display = "block";
	          } else {
	               el.style.display = "none";
	          }
	     }
     }