function createCookie(name, value, days)

{

	if (days)

	{

		var date=new Date();

		date.setTime(date.getTime()+(days*86400000));

		var expires="; expires="+date.toGMTString();

	}

	else

	{

		var expires="";

	}

	document.cookie=name+"="+value+expires+"; path=/";

}



function readCookie(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);

}