json datetime转换问题

我用Newtonsoft.Json.dll转换成json，这次是把一个集合转换成json，这个集合里有个DateTime类型的数据，
转换完成后会变成/Date(1286375605000+0800)/这样，请问怎么才能给他转换成时间格式哇

<script type="text/javascript">
function ChangeDateFormat(time) {
    if (time != null) {
        var date = new Date(parseInt(time.replace("/Date(", "").replace(")/", ""), 10));
        var month = date.getMonth() + 1 < 10 ? "0" + (date.getMonth() + 1) : date.getMonth() + 1;
        var currentDate = date.getDate() < 10 ? "0" + date.getDate() : date.getDate();
        return date.getFullYear() + "-" + month + "-" + currentDate;
    }
    return "";
}
window.onload=function(){
alert(ChangeDateFormat("/Date(1286375605000+0800)/")); // do you want ?
var date = new Date("Sun Jan 2 00:00:00 UTC+0800 2000");
date.getYear();        //获取当前年份(2位)  
date.getFullYear();    //获取完整的年份(4位,1970-????)  
date.getMonth();       //获取当前月份(0-11,0代表1月)  
date.getDate();        //获取当前日(1-31)  
date.getDay();         //获取当前星期X(0-6,0代表星期天)  
date.getTime();        //获取当前时间(从1970.1.1开始的<a href="https://www.baidu.com/s?wd=%E6%AF%AB%E7%A7%92&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1Y1mWRknWR1rHnvPvndryn30ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3EPHbsPHDzn1TL" target="_blank" class="baidu-highlight">毫秒</a>数)  
date.getHours();       //获取当前小时数(0-23)  
date.getMinutes();     //获取当前分钟数(0-59)  
date.getSeconds();     //获取当前秒数(0-59)  
date.getMilliseconds();    //获取当前<a href="https://www.baidu.com/s?wd=%E6%AF%AB%E7%A7%92&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1Y1mWRknWR1rHnvPvndryn30ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3EPHbsPHDzn1TL" target="_blank" class="baidu-highlight">毫秒</a>数(0-999)  
date.toLocaleDateString();     //获取当前日期  
var mytime=date.toLocaleTimeString();     //获取当前时间  
date.toLocaleString();        //获取日期与时间  
alert(date.toLocaleString());
};
</script>