//添加事件y.addEventListener('change', function() {
year = this.value
month = month
dayInWeek = new Date(year, month, 1).getDay()
printDay()
})
m.addEventListener('change', function() {
year = year
month = this.value
dayInWeek = new Date(year, month, 1).getDay()
printDay()
})y事件能夠觸發并且執行，m觸發之后整個日歷就變空白了，如下圖：
onchange事件的疑問？
郎朗坤
2019-01-28 14:16:14
