function showhide(id) 
{
    obj = document.getElementsByTagName("div");
    if (obj[id].style.visibility == 'visible')
	{
    	obj[id].style.visibility = 'hidden';
    }
    else 
	{
    	obj[id].style.visibility = 'visible';
    }
}

function hide(id) 
{
    obj = document.getElementsByTagName("div");
    if (obj[id].style.visibility == 'visible')
	{
    	obj[id].style.visibility = 'hidden';
    }
}

function show(id) 
{
    obj = document.getElementsByTagName("div");
    if (obj[id].style.visibility == 'hidden')
	{
    	obj[id].style.visibility = 'visible';
    }
}

function showtime(num) {
	show(num);
}

function hidetime(num) {
	hide(num);
}