javascript and cookies

gistfile1.js

// Based on: http://stackoverflow.com/a/1599291
// Fixed jshint errors and cleaned up a little.

function createCookie(name, value, days) {
	var expires = '';

	if (days) {
		var date = new Date();
		date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
		expires = '; expires=' + date.toGMTString();
	}

	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);
}