function switchMenu2(obj,button) {
        var el = document.getElementById(obj);
        var bt = document.getElementById(button);
        if ( el.style.display != 'none' ) {
                el.style.display = 'none';
                bt.innerHTML="+"
        }
        else {
                el.style.display = '';
                bt.innerHTML="-";
        }
}

function hideContent(){
        //turn all menus off
        for(var a=1;a<6;a++){
                var c="menu"+a+"content";
                var b="menu"+a+"button";
                switchMenu2(c,b);
        }
}