小编Sla*_*dex的帖子

HTML:

<input id="sdata" type="hidden" value='{"1651":["12","1"],"1650":["30","0"],"1649":["20","0"],"1648":["13","2"],"1647":["11","0"],"1646":["10","0"],"1645":["12","0"],"1644":["8","0"],"1643":["16","1"],"1642":["10","1"],"1641":["10","0"],"1640":["18","3"]}' />

JS:

var data = $.parseJSON($('#sdata').val());
$.each(data, function(id, sc) {
    alert(id);
}

OUT:1640,1641,1642,......,1651

如何以相反的顺序(例如1651,1650 ......)？