jQuery简单操作cookie的插件实例

jQuery.cookie = function(name, value, options) {  if (typeof value != 'undefined') { // name and value given, set cookie    options = options || {};    if (value === null) {      value = '';      options.expires = -1;    }    var expires = '';    if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {      var date;      if (typeof options.expires == 'number') {        date = new Date();        date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));      } else {        date = options.expires;      }      expires = '; expires=' + date.toUTCString();    }    var path = options.path ? '; path=' + (options.path) : '';    var domain = options.domain ? '; domain=' + (options.domain) : '';    var secure = options.secure ? '; secure': '';    document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');  } else {    var cookieValue = null;    if (document.cookie && document.cookie != '') {      var cookies = document.cookie.split(';');      for (var i = 0; i < cookies.length; i++) {        var cookie = jQuery.trim(cookies[i]);        if (cookie.substring(0, name.length + 1) == (name + '=')) {          cookieValue = decodeURIComponent(cookie.substring(name.length + 1));          break;        }      }    }    return cookieValue;  }};

//使用方法如下://设置cookie的键值对//$.cookie('name', ‘value');//设置cookie的键值对，有效期，路径，域，安全//$.cookie('name', ‘value', {expires: 7, path: ‘/', domain: ‘jquery.com', secure: true});//新建一个cookie 包括有效期 路径 域名等//读取cookie的值//var account= $.cookie('name');//删除一个cookie//example $.cookie('name', null);