function showmenu(elmnt)
{
  document.getElementById(elmnt).style.visibility="visible";
}
function hidemenu(elmnt)
{
  document.getElementById(elmnt).style.visibility="hidden";
}

function getCookie(cookie_name)
{
  var data = document.cookie.match ( '(^|;) ?' + cookie_name + '=([^;]*)(;|$)' );
  if (data)
  {
    return (unescape(data[2]));
  }
  else
  {
    return null;
  }
}

function checkCookie()
{
  var cookiedata = getCookie("cookieman");
  if (cookiedata != null)
  {
    document.getElementById('input').innerHTML="<form action='login.php' method='post' name='logout'><b>Welcome back, " + cookiedata + "!</b> <span class='small absolute'><input type='submit' value='Logout' style='font-size:100%' onclick='delCookie()' /></span></form>";
  }
}
function setCookie()
{
  var expiry = new Date();
  expiry.setMonth(expiry.getMonth() + 1);
  var namevar=escape(document.getElementById("name").value);
  document.cookie="cookieman=" + namevar + ";" + "expires=" + expiry.toGMTString() + ";";
}
function delCookie()
{
  document.cookie = 'cookieman=; expires=Thu, 01-Jan-70 00:00:01 GMT;';
}