JS 获取当月 1 号是星期几，当月最大号

<script language="javascript"> var date = new Date(); date.setDate(1); var weekday=new Array(7); wee

<script language="javascript"> var date = new Date(); date.setDate(1); var weekday=new Array(7); weekday[0]="星期日"; weekday[1]="星期一"; weekday[2]="星期二"; weekday[3]="星期三"; weekday[4]="星期四"; weekday[5]="星期五"; weekday[6]="星期六"; alert("本月第一天是 " + weekday[date.getDay()]); date.setMonth(date.getMonth() + 1); var lastDate = new Date(date - 3600000*24); alert("本月最后一天是 " + lastDate.getDate()); </script>

ps：var day = new Date(2016,5,1); //输出 2016-06-01 是星期几alert(day.getDay());