前端时间戳转时间的方法

function fmtDate(obj){
        var date =  new Date(obj);
        var y = 1900+date.getYear();
        var m = "0"+(date.getMonth()+1);
        var d = "0"+date.getDate();
        return y+"-"+m.substring(m.length-2,m.length)+"-"+d.substring(d.length-2,d.length);
    }