Js操作Cookies

Js操作Cookies

1，要清空浏览器的所有cookies，
2，要清空某网站的cookies，<wbr> //youkuaiyun.com的所有cookies<br> 3，要清空某网站的用户名字的cookies，//youkuaiyun.com 的cookies中的用户名username<br> 解答:</wbr>

// js 遍历所有Cookie
function foreach()
{
<wbr> var strCookie=document.cookie;<br><wbr> var arrCookie=strCookie.split("; "); // 将多cookie切割为多个名/值对<br><wbr> for(var i=0;i &lt;arrCookie.length;i++)<br> { // 遍历cookie数组，处理每个cookie对<br><wbr><wbr> var arr=arrCookie[i].split("=");<br><wbr><wbr> if(arr.length&gt;0)<br><wbr><wbr> DelCookie(arr[0]);<br> }<br><wbr><br> }<br> function GetCooki(offset)<br><wbr><br> {<br> var endstr = document.cookie.indexOf (";", offset);<br> if (endstr == -1)<br> endstr = document.cookie.length;<br> return decodeURIComponent(document.cookie.substring(offset, endstr));<br> }<br> function DelCookie(name)<br> {<br> var exp = new Date();<br> exp.setTime (exp.getTime() - 1);<br> var cval = GetCookie (name);<br> document.cookie = name + "=" + cval + "; expires="+ exp.toGMTString();<br> }<br><br> function GetCookie(name)<br> {<br> var arg = name + "=";<br> var alen = arg.length;<br> var clen = document.cookie.length;<br> var i = 0;<br> while (i &lt; clen)<br> {<br> var j = i + alen;<br> if (document.cookie.substring(i, j) == arg)<br> return GetCooki (j);<br> i = document.cookie.indexOf(" ", i) + 1;<br> if (i == 0) break;<br> }<br> return null;<br> }</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

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function addCookie(objName,objValue,objHours)

{

//添加cookie

var str = objName + "=" + escape(objValue);

if(objHours > 0)

{

//为0时不设定过期时间，浏览器关闭时cookie自动消失

var date = new Date();

var ms = objHours*3600*1000;

date.setTime(date.getTime() + ms);

str += "; expires=" + date.toGMTString(); }

document.cookie = str;

alert("添加cookie成功");

}

function getCookie(objName)

{

//获取指定名称的cookie的值

var arrStr = document.cookie.split("; ");

for(var i = 0;i < arrStr.length;i ++){ var temp = arrStr[i].split("="); if(temp[0] == objName)

return unescape(temp[1]); } }function delCookie(name)

{

//为了删除指定名称的cookie，可以将其过期时间设定为一个过去的时间

var date = new Date();

date.setTime(date.getTime() - 10000);

document.cookie = name + "=a;

expires=" + date.toGMTString();

}

function allCookie()

{

//读取所有保存的cookie字符串

var str = document.cookie;

if(str == "")

{

str = "没有保存任何cookie";

}

alert(str);

}