var cookie_name = "aref";  

if(read_cookie(cookie_name) == null)
{
	set_cookie(cookie_name, document.referrer);
}
	
function set_cookie(name, value)
{  
	var date = new Date();
	date.setTime(date.getTime()+(60*60*1000));	// will expire in 60 mins
	var expires = "; expires="+date.toGMTString();
	
	document.cookie = name+"="+value+expires+"; path=/";
	
	//document.write('set cookie to ' + value);
	//document.write('whole thing is  ' + document.cookie);
} 

function read_cookie(name) 
{
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) 
	{
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) 
{
	createCookie(name,"",-1);
}