function hidetable()
{ 
for (var el, a = 0; a < arguments.length; ++a)
{
if (el = document.getElementById(arguments[a]))
el.style.display = 'none';
}
}

function showtable()
{
for (var el, a = 0; a < arguments.length; ++a)
{
if (el = document.getElementById(arguments[a]))
el.style.display = 'block';
}
}