var hide_top = 10;
    var hide_side1 = 10;
    var hide_side2 = 10;
    
    function ontopmenu() {
      hide_top = 20;
    }

    function offtopmenu() {
      hide_top = 10;
      setTimeout("hidemenu()",700);  
    }

    function showmenu() {
      hide_top = 20;
      hide_side1 = 10;  
      hide_side2 = 10;  
      setTimeout("hideside1menu()", 50);  
      document.getElementById('top1').style.visibility="visible";
    }

    function hidemenu() {
      if (hide_top == 10) {
        document.getElementById('top1').style.visibility="hidden";
      }
    }

    function onside1menu() {
      hide_side1 = 20;
    }
    function offside1menu() {
      hide_side1 = 10;
      setTimeout("hideside1menu()",700);
    }

    function showsidemenu1() {
      hide_side1 = 20;
      hide_top = 10;
      hide_side2 = 10;
      setTimeout("hidemenu()", 50);
      document.getElementById('side1').style.visibility="visible";
    }
    function hideside1menu() {
      if (hide_side1 == 10) {
        document.getElementById('side1').style.visibility="hidden";
      }
    }