js获取星期

<script>

  var a=new Date();//定义日期对象

  var weekday=["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];//定义数组对象,给每个数组项赋值

  var mynum=a.getDay();//返回值存储在变量mynum中

  document.write(a.getDay());//输出getDay()获取值

  document.write("今天是："+ weekday[mynum]+"<br/><br/>");//输出星期几

</script>

js获取年月日星期

<script>
function sj(a){

var d=new Date();

d.setDate(d.getDate()+a);

var weekday=["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];

xq=weekday[d.getDay()]

var n=d.getFullYear();

var y=d.getMonth()+1;

var r=d.getDate()

return n+"年"+y+"月"+r+"日"+xq

}

document.write(sj(0))

</script>