Javascript中的Cookie操作

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <script type="text/javascript">
        //添加cookie
        function setCookie(key, value, delay) {
            var oDate = new Date();
            oDate.setDate(oDate.getDate() + delay);//设置过期时间
            document.cookie = key + "=" + value + ";expires=" + oDate;
        }

        setCookie("name", "hahah", 13);
        setCookie("pwd", "sdfsf", 234);
        //删除cookie
        function removeCookie(key){
            setCookie(key,1,-1);
        }
    </script>
</head>
<body>
</body>
</html>

　　//本域内设置cookie

<script type="text/javascript">  
function setCookie(c_name,value,expiredays) {  
var exdate=new Date();  
exdate.setDate(exdate.getDate()+expiredays);  
document.cookie=c_name+ "=" +escape(value)+((expiredays==null) ? "" : ";expires="+exdate.toGMTString())+";path=/;domain=b.com";  
}  
window.onload=function(){  
setCookie("listallwjh","sfwjh");  
alert("Cookie设置成功！");  
}  
</script>

　　跨域设置cookie

<script>  
function getCookie(c_name) {  
if (document.cookie.length>0)  
{  
c_start=document.cookie.indexOf(c_name + "=");  
if (c_start!=-1)  
{   
c_start=c_start + c_name.length+1 ;  
c_end=document.cookie.indexOf(";",c_start);  
if (c_end==-1) c_end=document.cookie.length;  
return unescape(document.cookie.substring(c_start,c_end));  
}   
}  
return "";  
}  
window.onload=function(){  
var c_name="listallwjh";  
if(getCookie("listallwjh")!=null){  
alert(getCookie("listallwjh"));  
}  
}  
</script>

　　//读取Cookie

 //读取cookie
        function getCookie(key) {
            var arr = document.cookie.split(";");
            for (var i = 0; i < arr.length; i++) {
                var arr2 = arr[i].split("=");
                if (arr2[0]==key) {
                    return arr2[1];
                }
            }
        }