js文件Cookie存取值示例代码

点评：本文主要介绍了js文件Cookie存取值的使用,感兴趣的朋友可以参考一下，希望对大家有所帮助！

复制代码 代码如下:

/* 

Cookie工具 

使用方法: 

//存值 

var value = "7天"; 

tools.cookie("day",value, {expires:7}); //将字符串:"7天" 以 "day"这个key保存到cookie中5天 

//取值 

var v = tools.cookie("day"); //用 "day" 这个key从cookie取出值 

*/ 

tools.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.toGMTString)) { 

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.toGMTString(); // 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; 

} 

};