function menu1_hover(Object)
  {
  if (Object.className == 'menu_l')
    {
    Object.className = 'menu_l_hover';
    document.getElementById("submenu2").style.visibility = 'hidden';
    document.getElementById("submenu3").style.visibility = 'hidden';
    document.getElementById("submenu4").style.visibility = 'hidden';
    document.getElementById("submenu5").style.visibility = 'hidden';
    document.getElementById("submenu6").style.visibility = 'hidden';
    }
    else if (Object.className == 'menu_l_hover')
      {
      Object.className = 'menu_l';
      }
  }


function menu2_hover(Object)
  {
  if (Object.className == 'menu_l')
    {
    Object.className = 'menu_l_hover';
    document.getElementById("submenu3").style.visibility = 'hidden';
    document.getElementById("submenu4").style.visibility = 'hidden';
    document.getElementById("submenu5").style.visibility = 'hidden';
    document.getElementById("submenu6").style.visibility = 'hidden';
    document.getElementById("submenu2").style.visibility = 'visible';
    }
    else if (Object.className == 'menu_l_hover')
      {
      Object.className = 'menu_l';
      }
  }
  
function menu3_hover(Object)
  {
  if (Object.className == 'menu_l')
    {
    Object.className = 'menu_l_hover';
    document.getElementById("submenu2").style.visibility = 'hidden';
    document.getElementById("submenu4").style.visibility = 'hidden';
    document.getElementById("submenu5").style.visibility = 'hidden';
    document.getElementById("submenu6").style.visibility = 'hidden';
    document.getElementById("submenu3").style.visibility = 'visible';
    }
    else if (Object.className == 'menu_l_hover')
      {
      Object.className = 'menu_l';
      }
  }
  
function menu4_hover(Object)
  {
  if (Object.className == 'menu_l')
    {
    Object.className = 'menu_l_hover';
    document.getElementById("submenu2").style.visibility = 'hidden';
    document.getElementById("submenu3").style.visibility = 'hidden';
    document.getElementById("submenu5").style.visibility = 'hidden';
    document.getElementById("submenu6").style.visibility = 'hidden';
    document.getElementById("submenu4").style.visibility = 'visible';
    }
    else if (Object.className == 'menu_l_hover')
      {
      Object.className = 'menu_l';
      }
  }
  
function menu5_hover(Object)
  {
  if (Object.className == 'menu_l')
    {
    Object.className = 'menu_l_hover';
    document.getElementById("submenu2").style.visibility = 'hidden';
    document.getElementById("submenu3").style.visibility = 'hidden';
    document.getElementById("submenu4").style.visibility = 'hidden';
    document.getElementById("submenu6").style.visibility = 'hidden';
    document.getElementById("submenu5").style.visibility = 'visible';
    }
    else if (Object.className == 'menu_l_hover')
      {
      Object.className = 'menu_l';
      }
  }
  
function menu6_hover(Object)
  {
  if (Object.className == 'menu_l')
    {
    Object.className = 'menu_l_hover';
    document.getElementById("submenu2").style.visibility = 'hidden';
    document.getElementById("submenu3").style.visibility = 'hidden';
    document.getElementById("submenu4").style.visibility = 'hidden';
    document.getElementById("submenu5").style.visibility = 'hidden';
    document.getElementById("submenu6").style.visibility = 'visible';
    }
    else if (Object.className == 'menu_l_hover')
      {
      Object.className = 'menu_l';
      }
  }
  
function menucal_hover(Object)
  {
  if (Object.className == 'menu_l')
    {
    Object.className = 'menu_l_hover';
    }
    else if (Object.className == 'menu_l_hover')
      {
      Object.className = 'menu_l';
      }
  }
  
function submenu_hover(Object)
  {
  if (Object.className == 'submenu_l')
    Object.className = 'submenu_l_hover';
    else if (Object.className == 'submenu_l_hover')
      Object.className = 'submenu_l';
   }  
  
function close_menu()
  {
  document.getElementById("submenu2").style.visibility = 'hidden';
  document.getElementById("submenu3").style.visibility = 'hidden';
  document.getElementById("submenu4").style.visibility = 'hidden';
  document.getElementById("submenu5").style.visibility = 'hidden';
  document.getElementById("submenu6").style.visibility = 'hidden';
  }