js cookie操作

// /設置cookie
function setCookie(name,value)
{
    var Days = 7;
    updateCookie(name,value,Days);

}
function updateCookie(name,value,expiredDay){
    var exp = new Date();
    exp.setTime(exp.getTime() + expiredDay*24*60*60*1000);
    document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();
}

//讀取cookies
function getCookie(name)
{
    var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");
    if(arr=document.cookie.match(reg))
        return unescape(arr[2]);
    else
        return null;
}

//刪除cookies
function delCookie(name)
{
    updateCookie(name, "", -1);

}