//创建cookie function setCookie(name, value, expires, path, domain, secure) { var cookieText = encodeURIComponent(name) + '=' + encodeURIComponent(value); if (expires instanceof Date) { cookieText += '; expires=' + expires; } if (path) { cookieText += '; expires=' + expires; } if (domain) { cookieText += '; domain=' + domain; } if (secure) { cookieText += '; secure'; } document.cookie = cookieText; } //获取cookie function getCookie(name) { var cookieName = encodeURIComponent(name) + '='; var cookieStart = document.cookie.indexOf(cookieName); var cookieValue = null; if (cookieStart > -1) { var cookieEnd = document.cookie.indexOf(';', cookieStart); if (cookieEnd == -1) { cookieEnd = document.cookie.length; } cookieValue = decodeURIComponent( document.cookie.substring(cookieStart + cookieName.length, cookieEnd)); } return cookieValue; } //删除cookie function unsetCookie(name) { document.cookie = name + "= ; expires=" + new Date(0); } //失效天数 function setCookieDate(day) { if (typeof day == 'number' && day > 0) { var date = new Date(); date.setDate(date.getDate() + day); } else { throw new Error('传递的day 必须是一个天数,必须比0 大'); } return date; }