function showdiv1()
{
document.getElementById('submenu1').style.display='block';
}
function hidediv1()
{
document.getElementById('submenu1').style.display='none';
}
function showdiv2()
{
document.getElementById('submenu2').style.display='block';
}
function hidediv2()
{
document.getElementById('submenu2').style.display='none';
}