年月日 手写思路

function setDate(){
    var minYear = 1900
    var maxYear = (new Date).getFullYear();
    var yearSel = $('#year');
    var monthSel =$('#month');
    var daySel = $('#days');
    console.log(maxYear);

    for(var y = maxYear;y >= minYear;y--){
        var yearOpt = $('function setDate(){
    var minYear = 1900