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

function Switch(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=="submenu")
		    ar[i].style.display = "none";
	    }
	    el.style.display = "block";
	}
	else
	    el.style.display = "none";
    }
}