// JavaScript Document

function show(id) 
{
	if (document.getElementById(id).style.visibility == "hidden") 
	{
  		document.getElementById(id).style.visibility = "visible";
	}
}

function hide(id)
{
    if (document.getElementById(id).style.visibility == "visible")
    {
		document.getElementById(id).style.visibility = "hidden";
	}
}