function getCookie(c_name)
{
if (document.cookie.length>0)
  {
  c_start=document.cookie.indexOf(c_name + "=");
  if (c_start!=-1)
    {
    c_start=c_start + c_name.length+1;
    c_end=document.cookie.indexOf(";",c_start);
    if (c_end==-1) c_end=document.cookie.length;
    return unescape(document.cookie.substring(c_start,c_end));
    }
  }
return "";
}

function setCookie(c_name,value,expiredays)
{
var exdate=new Date();
exdate.setDate(exdate.getDate()+expiredays);
document.cookie=c_name+ "=" +escape(value)+
((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
    switchIt('challengeBox');
}

function checkCookie()
{
visited=getCookie('visited');
if (visited!=null && visited!="")
  {
  }
else
  {
    switchIt('challengeBox');
  }
}

function switchIt(listname) {
	var signname = listname + 'test';
	  if (document.getElementById(listname).style.display == 'block') {
		  document.getElementById(listname).style.display = 'none';
	  } else {
		   document.getElementById(listname).style.display = 'block';
	  }

}