Js 中文显示星期几方法

<script>
    //定义一个中文数组
    var arr= new Array("星期日","星期一","星期二","星期三","星期四","星期五","星期六");

    var myDate = new Date();
    var cycle = arr[myDate.getDay()];

    alert(cycle);
</script>

使用js中的数组简洁化