var d = document;

// Cookies stuff from www.quirksmode.org
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 = "";
	}

	d.cookie = name + "=" + value + expires + "; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = d.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);
}