js时间戳转换

<meta charset="utf-8">
<script>
function double_to_stamp(str_time){
    var new_str = str_time.replace(/:/g,'-');
    new_str = new_str.replace(/ /g,'-');
    var arr = new_str.split("-");
    var datum = new Date(Date.UTC(arr[0],arr[1]-1,arr[2],arr[3]-8,arr[4],arr[5]));
    return strtotime = datum.getTime()/1000;
}

function stamp_to_double(unixtime) {
    var timestr = new Date(parseInt(unixtime) * 1000);
    var datetime = timestr.toLocaleString().replace(/年|月/g, "-").replace(/日/g, " ");
    return datetime;
}

var stamp = double_to_stamp( '2017-05-11 19:10:00');
document.write("<br><b>转换后的UNIX时间戳为</b>: "+stamp);

var date_time = stamp_to_double('1494500293');
document.write("<br><b>转换后的日期为</b>: "+date_time);
</script>