返回星期方法,返回指定位置的字符

<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>获得星期</title>
<script type="text/javascript">
var mydate=new Date();
var weekday=["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];
document.write("今天是："+weekday[mydate.getDay()]);
// var num = mydate.getDay();
// document.write(mydate.getDay());
// document.write("当前星期"+ weekday[num]);
</script>
</head>
<body>
</body>
</html>

 

返回指定位置的字符

stringObject.charAt(index)-->或    stringObject.charAt(stringObject.length-1)    //1.字符串中第一个字符的下标是 0。最后一个字符的下标为字符串长度减一（string.length-1）
<script type="text/javascript">
  var mystr="I love JavaScript!"
  document.write(mystr.charAt(2));
</script>
posted @ 2019-03-05 21:01  旧崖  阅读(368)  评论(0)  编辑  收藏  举报