js获取当前月的1号是星期几

Posted 2023-05-17

还有当前月有最大是几号

参考技术A 用javascript就可以了，ASP中也可以用JS代码。

<script language="javascript">
var week;
switch (new Date().getDay())
case 1:
week="星期一";
break;
case 2:
week="星期二";
break;
case 3:
week="星期三";
break;
case 4:
week="星期四";
break;
case 5:
week="星期五";
break;
case 6:
week="星期六";
break;
default:
week="星期天";

document.write((new Date().getMonth()+1)+"月"+new Date().getDate()+"日 "+week);
</script>

参考资料：百度一下

参考技术B <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>本回答被提问者和网友采纳

js如何判断 每年每个月的第一天是星期几?

参考技术A "日一二三四五六".split("")[(new Date(2014,0,1)).getDate()];