//获得Cookie解码后的值
function GetCookieVal(offset)
{
    var endstr = document.cookie.indexOf (";", offset);
    if (endstr == -1)
    endstr = document.cookie.length;
    return unescape(document.cookie.substring(offset, endstr));
}

//设定Cookie值
function SetCookie(name, value)
{
    // 终止日期
//    var expireDays=1; 
//    var expdate = new Date();
//    expdate=expdate.getTime()+expireDays*24*3600*1000;
//    var argv = SetCookie.arguments;
//    var argc = SetCookie.arguments.length;
//    var expires = (argc > 2) ? argv[2] : null;
//    var path = (argc > 3) ? argv[3] : null;
//    var domain = (argc > 4) ? argv[4] : null;
//    var secure = (argc > 5) ? argv[5] : false;
//    if(expires!=null) expdate.setTime(expdate.getTime() + ( expires * 1000 ));
//    document.cookie = name + "=" + escape (value) +((expires == null) ? "" : ("; expires="+ expdate.toGMTString()))
//    +((path == null) ? "" : ("; path=" + path)) +((domain == null) ? "" : ("; domain=" + domain))
//    +((secure == true) ? "; secure" : "");
    setCookie(name,value,"","","","");
}
function setCookie(sName, sValue, oExpires, sPath, sDomain, bSecure) 
{ 
        var sCookie = sName + "=" + encodeURIComponent(sValue); 
        if (oExpires) { 
            sCookie += "; expires=" + oExpires.toGMTString(); 
        } 
        if (sPath) {    
            sCookie += "; path=" + sPath; 
        } 
        if (sDomain) {  
            sCookie += "; domain=" + sDomain; 
        }  
        if (bSecure) {        
            sCookie += "; secure"; 
        } 
        document.cookie = sCookie;
     } 

//删除Cookie
function DelCookie(name)
{
    var exp = new Date();
    exp.setTime (exp.getTime() - 1);
    var cval = GetCookie (name);
    document.cookie = name + "=" + cval + "; expires="+ exp.toGMTString();
}

//获得Cookie的原始值
function GetCookie(name)
{
    var arg = name + "=";
    var alen = arg.length;
    var clen = document.cookie.length;
    var i = 0;
    while (i < clen)
    {
    var j = i + alen;
    if (document.cookie.substring(i, j) == arg)
    return decodeURI(GetCookieVal (j));
    i = document.cookie.indexOf(" ", i) + 1;
    if (i == 0) break;
    }
    return null;
}

//function GetCookie(name) 
//{
//    var cookies = document.cookie.split(";");
//    for(var i=0;i<cookies.length;i++) 
//    {
//        var cookie = cookies[i];
//        var cookieStr = cookie.split("=");
//        if(cookieStr && cookieStr[0].trim()==name) 
//        {
//            return decodeURI(cookieStr[1]);
//        }
//    }
//}

//var Cookie = 
//{ 
//    isAllowed: document.cookie && document.cookie != '', 
//    set: function(cn, cv, d, dm)
//    { 
//        var now = new Date(); 
//        var expire = new Date(); 
//        if (d == null || d == 0) 
//        { 
//            d = 1; 
//        } 
//        expire.setTime(now.getTime() + 3600000 * 24 * d); 
//        document.cookie = cn + '=' + encodeURI(cv) + ';expires=' + expire.toGMTString() + ';domain=' + dm + '; path=/'; 
//    }, 
//    clear: function(cn, dm)
//    { 
//        if (this.get(name)) 
//        { 
//            document.cookie = cn + '=' + ((domain) ? '; domain=' + dm : '') + '; expires=Thu, 01-Jan-70 00:00:01 GMT'; 
//        } 
//    }, 
//    get: function(cn)
//    { 
//        var dc = document.cookie; 
//        var prefix = cn + '='; 
//        var begin = dc.indexOf('; ' + prefix); 
//        if (begin == -1) 
//        { 
//            begin = dc.indexOf(prefix); 
//            if (begin != 0) 
//            { 
//                return null; 
//            } 
//        } 
//        else 
//        { 
//            begin += 2; 
//        } 
//        var end = document.cookie.indexOf(';', begin); 
//        if (end == -1) 
//        { 
//            end = dc.length; 
//        } 
//        return decodeURI(dc.substring(begin + prefix.length, end)); 
//    } 
//};