function HideMenu ()
{
 document.getElementById('subnavi1').style.visibility='hidden';
 document.getElementById('subnavi2').style.visibility='hidden';
 document.getElementById('subnavi4').style.visibility='hidden';
 document.getElementById('subnavi5').style.visibility='hidden';
 document.getElementById('subnavi6').style.visibility='hidden';
 document.getElementById('clean').style.visibility='hidden';
 return;
}

function ShowMenu (i)
{
 switch(i)
  {
   case 1:
    {
     document.getElementById('subnavi1').style.visibility='visible';
     document.getElementById('subnavi2').style.visibility='hidden';
     document.getElementById('subnavi4').style.visibility='hidden';
     document.getElementById('subnavi5').style.visibility='hidden';
     document.getElementById('subnavi6').style.visibility='hidden';
     document.getElementById('clean').style.visibility='visible';
     return;
    }
   case 2:
    {
     document.getElementById('subnavi1').style.visibility='hidden';
     document.getElementById('subnavi2').style.visibility='visible';
     document.getElementById('subnavi4').style.visibility='hidden';
     document.getElementById('subnavi5').style.visibility='hidden';
     document.getElementById('subnavi6').style.visibility='hidden';
     document.getElementById('clean').style.visibility='visible';
     return;
    }
   case 4:
    {
     document.getElementById('subnavi1').style.visibility='hidden';
     document.getElementById('subnavi2').style.visibility='hidden';
     document.getElementById('subnavi4').style.visibility='visible';
     document.getElementById('subnavi5').style.visibility='hidden';
     document.getElementById('subnavi6').style.visibility='hidden';
     document.getElementById('clean').style.visibility='visible';
     return;
    }
   case 5:
    {
     document.getElementById('subnavi1').style.visibility='hidden';
     document.getElementById('subnavi2').style.visibility='hidden';
     document.getElementById('subnavi4').style.visibility='hidden';
     document.getElementById('subnavi5').style.visibility='visible';
     document.getElementById('subnavi6').style.visibility='hidden';
     document.getElementById('clean').style.visibility='visible';
     return;
    }
   case 6:
    {
     document.getElementById('subnavi1').style.visibility='hidden';
     document.getElementById('subnavi2').style.visibility='hidden';
     document.getElementById('subnavi4').style.visibility='hidden';
     document.getElementById('subnavi5').style.visibility='hidden';
     document.getElementById('subnavi6').style.visibility='visible';
     document.getElementById('clean').style.visibility='visible';
     return;
    }
  }
}