function show(num)
{
  document.all[num].style.visibility = "visible";
  document.all[num].style.display = "block";
}


function hide(num)
{
  document.all[num].style.visibility = "hidden";
  document.all[num].style.display = "none";
}

function showhide(num, total)
{
	for (i=1; i<=total; i++)
	{
		document.all['a'+ i].style.visibility = "hidden";
		document.all['a'+ i].style.display = "none";
	}
	for (i=1; i<=num; i++)
	{
		document.all['a'+ i].style.visibility = "visible";
		document.all['a'+ i].style.display = "block";
	}
}

function showhide1(num, id, total)
{
	for (i=1; i<=total; i++)
	{
		document.all['a_'+id+'_'+ i].style.visibility = "hidden";
		document.all['a_'+id+'_'+ i].style.display = "none";
	}
	for (i=1; i<=num; i++)
	{
		document.all['a_'+id+'_'+ i].style.visibility = "visible";
		document.all['a_'+id+'_'+ i].style.display = "block";
	}
}