javascript中方便增删改cookie的一个类

主要是通过对document.cookie字符串的分析来进行功能的组装的。
温习一下javascript中对cookie的操作：
增加cookie可以用document.cookie="userId=111";来实现
完整版可以用：document.cookie="userId=111;domain=.google.com;path=\;secure=secure;expire="+date.toGMTString();
可以设置cookie的过期时间，域名，路径
需要删除只要将expire的时间设为现在之前就可以了
现在上我修改的javascript.cookie.js的类

/* 
cookie helper class 
easy to write,get,delete 
*/ 
var myCookie={ 
get:function(name){ 
if(typeof name != "undefined") 
{ 
//if name given call the get value function 
return myCookie_get(name); 
}else{ 
//if name is not given,i want get all the cookie item 
return myCookie_getAll(); 
} 
}, 
add:function(name,value,options){ 
//write the cookie 
myCookie_add(name,value,options); 
}, 
delete:function(name){ 
//delete the cookie 
myCookie_add(name,null); 
} 
} 
String.prototype.Trim = function() 
{ 
return this.replace(/^\s+/g,"").replace(/\s+$/g,""); 
} 
/* 
cookie write function 
@name:the cookie name not null 
@value:the cookie value null==delete the cookie 
@option:{"expires":expire time;"path":/;"domain":localhost;"secure":secure} 
*/ 
function myCookie_add(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(''); 
} 
} 
/* 
get the name cookie 
@name:the cookie's name 
*/ 
function myCookie_get(name) 
{ 
var cookieValue = null; 
if (document.cookie && document.cookie != '') { 
var cookies = document.cookie.split(';'); 
for (var i = 0; i < cookies.length; i++) { 
var cookie = cookies[i].Trim(); 
// 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; 
} 
/* 
get all the cookie return as a json 
*/ 
function myCookie_getAll() 
{ 
var cookieArray = new Array(); 
var str=""; 
var temp; 
if (document.cookie && document.cookie != '') { 
var cookies = document.cookie.split(';'); 
for (var i = 0; i < cookies.length; i++) { 
var cookie = cookies[i].Trim(); 
temp=cookie.split('='); 
//take the 
cookieArray.push("{\"name\":\""+decodeURIComponent(temp[0])+"\",\"value\":\""+decodeURIComponent(temp[1])+"\"}"); 
} 
str=cookieArray.join(","); 
} 
str="["+str+"]"; 
return eval('('+str+')'); 
}

调用也是相当简单

myCookie.add("useraccount","admin",{"expires":5});//加入一个期限为5天的cookie 
alert(myCookie.get("useraccount"));//取出cookie 
cookies=myCookie.get();//得到所有的cookie 
for(var i=0;i<cookies.length;i++) 
{ 
alert(cookies[i]["name"]+":"+cookies[i]["value"]); 
} 
myCookie.delete("useraccount");//删除刚刚添加的cookie 
alert(myCookie.get("useraccount"));