function $(id) {
	return document.getElementById(id);
}

var curr_menu = '';
function show_menu(menu_id) {
	hide_menu();
	$(menu_id).style.display='block';
	$(menu_id).style.zIndex='2000';
	curr_menu = menu_id;
}

function hide_menu() {
	if (curr_menu != '') {
		$(curr_menu).style.display='none';
	}
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
	window.open(theURL,winName,features);
}