function createCookie(name, value, days)

{

	if (days)

	{

		var date = new Date();

		date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));

		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);

}