可兼容IE的获取及设置cookie的jquery.cookie函数方法

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/** 
* Cookie plugin 
* 
* Copyright (c) 2006 Klaus Hartl (stilbuero.de) 
* Dual licensed under the MIT and GPL licenses: 
* http://www.opensource.org/licenses/mit-license.php 
* http://www.gnu.org/licenses/gpl.html 
* 
*/ 

/** 
* Create a cookie with the given name and value and other optional parameters. 
* 
* @example $.cookie('the_cookie', 'the_value'); 
* @desc Set the value of a cookie. 
* @example $.cookie('the_cookie', 'the_value', {expires: 7, path: '/', domain: 'jquery.com', secure: true}); 
* @desc Create a cookie with all available options. 
* @example $.cookie('the_cookie', 'the_value'); 
* @desc Create a session cookie. 
* @example $.cookie('the_cookie', null); 
* @desc Delete a cookie by passing null as value. 
* 
* @param String name The name of the cookie. 
* @param String value The value of the cookie. 
* @param Object options An object literal containing key/value pairs to provide optional cookie attributes. 
* @option Number|Date expires Either an integer specifying the expiration date from now on in days or a Date object. 
* If a negative value is specified (e.g. a date in the past), the cookie will be deleted. 
* If set to null or omitted, the cookie will be a session cookie and will not be retained 
* when the the browser exits. 
* @option String path The value of the path atribute of the cookie (default: path of page that created the cookie). 
* @option String domain The value of the domain attribute of the cookie (default: domain of page that created the cookie). 
* @option Boolean secure If true, the secure attribute of the cookie will be set and the cookie transmission will 
* require a secure protocol (like HTTPS). 
* @type undefined 
* 
* @name $.cookie 
* @cat Plugins/Cookie 
* @author Klaus Hartl/klaus.hartl@stilbuero.de 
*/ 

/** 
* Get the value of a cookie with the given name. 
* 
* @example $.cookie('the_cookie'); 
* @desc Get the value of a cookie. 
* 
* @param String name The name of the cookie. 
* @return The value of the cookie. 
* @type String 
* 
* @name $.cookie 
* @cat Plugins/Cookie 
* @author Klaus Hartl/klaus.hartl@stilbuero.de 
*/ 
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(); // use expires attribute, max-age is not supported by IE 
} 
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 { // only name given, get cookie 
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]); 
// Does this cookie string begin with the name we want? 
if (cookie.substring(0, name.length + 1) == (name + '=')) { 
cookieValue = decodeURIComponent(cookie.substring(name.length + 1)); 
break; 
} 
} 
} 
return cookieValue; 
} 
}; 

            
            


           
                
                                                

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