var opened_submenu = "";

function openMenu(obj){
	//abrir submenus
	submenu_to_open = getObj("submenu"+(obj.id.substr(4)));
	opened_submenu = (opened_submenu == "")?getObj("submenu_1"):opened_submenu;
	if(opened_submenu != submenu_to_open){
		closeSubMenu(opened_submenu);
		openSubmenu(submenu_to_open);
		opened_submenu = submenu_to_open;
	} else {
		reverseMenuState(submenu_to_open);
		opened_submenu = submenu_to_open;
	}
							
}
function openSubmenu(obj){
	obj.style.display="";
	parent_menu=(getObj("menu"+obj.id.substr(7)));
		parent_menu.className="menuitem_opened";
}
function reverseMenuState(obj){
	obj.style.display=(obj.style.display=="none")?"":"none";
	parent_menu=(getObj("menu"+obj.id.substr(7)));
	str=parent_menu.className;
	parent_menu.className=(parent_menu.className=="menuitem_opened")?"menuitem_closed":"menuitem_opened";

}

function closeSubMenu(obj){
	obj.style.display="none";
	parent_menu=(getObj("menu"+obj.id.substr(7)));
	parent_menu.className="menuitem_closed";
}

function getObj(param){
	if(document.all){
		return document.all[param];
	} else {
		return document.getElementById(param);
	}
}

function matchMenuName(param){
	var js_area=param.id.substr(7);	
}