////////////////////////////
//操作cookie相关
function getCookie(name) {
    var mycookie = document.cookie;
    var start1 = mycookie.indexOf(name + '=');
    var value = null;
    if (start1 == -1) {
        return null;
    } else {
        var start = mycookie.indexOf('=', start1) + 1;
        var end = mycookie.indexOf(';', start);
        if (end == -1) {
            end = mycookie.length;
        }
        value = unescape(mycookie.substring(start, end));
    }
    return value;
}
function setCookie(name, value, expireseconds) {
    var cookieString = name + '=' + escape(value) + ';';
    var expireDate = new Date();
    if (expireseconds) {
        expireDate.setTime(expireDate.getTime() + expireseconds * 86400000); //8640000一天的毫秒数
        //		expireDate.setTime(expireDate.getTime()+expireseconds*1000);//8640000一天的毫秒数
        cookieString += 'expires=' + expireDate.toGMTString() + ';';
    }
    cookieString += 'domain=csddt.com' + ';path=/';
    document.cookie = cookieString;
}
function delCookie(name) {
    var value = getCookie(name);
    if (value) {
        var expireDate = new Date();
        expireDate.setTime(expireDate.getTime() - 1);
        document.cookie = name + '=' + value + ';expires=' + expireDate.toGMTString();
    }
}
////////////////