/*JS操作cookies方法!*/
//写cookies
function setCookie(name, value)
{
    var Days = 30;
    var exp = new Date();
    exp.setTime(exp.getTime() + Days * 24 * 60 * 60 * 1000);
    document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString();
}
//读取cookies
function getCookie(name)
{
    var arr, reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)");
    if (arr = document.cookie.match(reg))
    {
        return unescape(arr[2]);
    }
    else
    {
        return null;
    }
}