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Javascript讀取cookie函數(shù)代碼

更新時間：2010年10月16日 00:50:19 作者：

Javascript讀取cookie函數(shù)代碼，需要的朋友可以參考下。

用法：
一、設(shè)置cookie

 
var cookie = new JSCookie(); 
// 普通設(shè)置 
cookie .SetCookie("key1","val1"); 
// 過期時間為一年 
var expire_time = new Date(); 
expire_time.setFullYear(expire_time.getFullYear() + 1); 
cookie .SetCookie("key2","val2",expire_time); 
// 設(shè)置域及路徑，帶過期時間 
cookie .SetCookie("key3","val3",expire_time,".cnblogs.com","/"); 
// 設(shè)置帶子鍵的cookie,子鍵分別是k1,k2,k3 
cookie .SetCookie("key4","k1=1&k2=2&k3=3"); 

二、讀取cookie

復(fù)制代碼代碼如下:

 
// 簡單獲取 
cookie .GetCookie("key1"); 
cookie .GetCookie("key2"); 
cookie .GetCookie("key3"); 
cookie .GetCookie("key4"); 
// 獲取key4的子鍵k1值 
cookie .GetChild("key4","k1"); 

三、刪除

復(fù)制代碼代碼如下:

 
cookie .Expire("key1"); 
cookie .Expire("key2"); 
cookie .Expire("key3"); 
cookie .Expire("key4"); 

示例：

復(fù)制代碼代碼如下:

 
<script type="text/javascript"> 
String.prototype.Trim = function() 
{ 
return this.replace(/^\s+/g,"").replace(/\s+$/g,""); 
} 
function JSCookie() 
{ 
this.GetCookie = function(key) 
{ 
var cookie = document.cookie; 
var cookieArray = cookie.split(';'); 
var getvalue = ""; 
for(var i = 0;i<cookieArray.length;i++) 
{ 
if(cookieArray[i].Trim().substr(0,key.length) == key) 
{ 
getvalue = cookieArray[i].Trim().substr(key.length + 1); 
break; 
} 
} 
return getvalue; 
}; 
this.GetChild = function(cookiekey,childkey) 
{ 
var child = this.GetCookie(cookiekey); 
var childs = child.split('&'); 
var getvalue = ""; 
for(var i = 0;i < childs.length;i++) 
{ 
if(childs[i].Trim().substr(0,childkey.length) == childkey) 
{ 
getvalue = childs[i].Trim().substr(childkey.length + 1); 
break; 
} 
} 
return getvalue; 
}; 
this.SetCookie = function(key,value,expire,domain,path) 
{ 
var cookie = ""; 
if(key != null && value != null) 
cookie += key + "=" + value + ";"; 
if(expire != null) 
cookie += "expires=" + expire.toGMTString() + ";"; 
if(domain != null) 
cookie += "domain=" + domain + ";"; 
if(path != null) 
cookie += "path=" + path + ";"; 
document.cookie = cookie; 
}; 
this.Expire = function(key) 
{ 
expire_time = new Date(); 
expire_time.setFullYear(expire_time.getFullYear() - 1); 
var cookie = " " + key + "=e;expires=" + expire_time + ";" 
document.cookie = cookie; 
} 
} 
</script> 

用正則的方法讀取cookie值
由于asp的cookie是經(jīng)過url編碼的，所以讀之前要unescape一下。

下面是我用正則的方法取cookie，包括單值和多值：

復(fù)制代碼代碼如下:

 
/************************************************** 
參數(shù)說明： 
sMainName Cookie名 
sSubName Cookie子鍵名，留空表示單值Cookie 
**************************************************/ 
function GetCookie(sMainName, sSubName) 
{ 
var re = new RegExp((sSubName ? sMainName + "=(?:.*?&)*?" + sSubName + "=([^&;$]*)" : sMainName + "=([^;$]*)"),"i"); 
return re.test(unescape(document.cookie)) ? RegExp["$1"] : ""; 
} 

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