var totalItems;
var selectedItem;
function initMenu(num,dftItem) {
	totalItems = num;
	if (dftItem!='') selectedItem=dftItem;
	for (i=1; i<=num; i++) {
		element = 'menulist'+i;
		var obj = document.getElementById(element);
		if (obj!=null) obj.style.display = (dftItem!=element)? 'none':'';
		//document.getElementById(element).style.display = (dftItem!=element)? 'none':'';
	}
}

function showMenu(link) {
	initMenu(totalItems,'');
	if (link==selectedItem)	{document.getElementById(link).style.display='none'; selectedItem='';}
	else {document.getElementById(link).style.display='';selectedItem=link;}
}