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();} else {expires = "";}document.cookie = encodeURIComponent(name) + "=" + encodeURIComponent(value) + expires + "; path=/";}
function readCookie(name) {var nameEQ = encodeURIComponent(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 decodeURIComponent(c.substring(nameEQ.length, c.length)); } return null;}
function eraseCookie(name) {createCookie(name, "", -1);}