function menuoneon()
{

document.getElementById('sub-menu-one').style.visibility = 'visible';

}


function menuoneoff()
{

document.getElementById('sub-menu-one').style.visibility  = 'Hidden';
}






function menutwoon()
{

document.getElementById('sub-menu-two').style.visibility = 'visible';

}


function menutwooff()
{

document.getElementById('sub-menu-two').style.visibility  = 'Hidden';
}





function menuthreeon()
{

document.getElementById('sub-menu-three').style.visibility = 'visible';

}


function menuthreeoff()
{

document.getElementById('sub-menu-three').style.visibility  = 'Hidden';
}