请教季度问题

Question

<script>
  function getSeasonSM(dt){
    var yv=dt.getYear();
    var mv=dt.getMonth();
var startmonth=Math.floor(mv/3)*3;
var endmonth=startmonth+2;
return new Array(new Date(yv,startmonth,1),
                 new Date(yv,endmonth+1,0));
  }
  var startebd=getSeasonSM(new Date("2005/9/22"));
  alert(startebd[0]+"\n"+startebd[1]);
</script>

Answer 1

求出第几季度只需要
function getSeasonSM(dt){
    return Math.floor(dt.getMonth()/3)+1;
}