jquery读写cookie

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新建一个js文件，将如下脚本拷贝进去

jQuery.cookie = function(name, value, options) {if (typeof value != 'undefined') {   options = options || {};   if (value === null) {    value = '';    options = $.extend({}, options);    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;}};

页面调用只要引进这个文件$.cookie("name"); //根据cookie名字取到cookie值$.cookie("name", "value");//设置cookie 名字，值$.cookie("name", value, { expires: 7 }); //设置cookie 名字，值，生命周期等属性$.cookie("name", null); //根据cookie名移除cookie

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