function format(shijianchuo){    function add0(m){        return m<10?'0'+m:m    };    var time = new Date(shijianchuo);    var y = time.getFullYear();    var m = time.getMonth()+1;    var d = time.getDate();    var h = time.getHours();    var mm = time.getMinutes();    var s = time.getSeconds();    return y+'-'+add0(m)+'-'+add0(d)+' '+add0(h)+':'+add0(mm)+':'+add0(s);}