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());
}

function checkCookie()
{
var randomnumber=Math.floor(Math.random()*11)
username=getCookie('username');
if (username!=null && username!="")
  {}
else
  {
	username=randomnumber;
	intro();
  if (username!=null && username!="")
  {
	setCookie('username',username,30);	//set expire days
  }
  }
}

 cookies = [];
  for (c in C=document.cookie.split('; '))
  {cookies[(cs=C[c].split('='))[0]]=unescape(cs[1]);}