js实现css标记显示

2021-08-01 00:41:02

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<style type="text/css">
   #show{
    width:100px;
height: 50px;
margin:0 auto;
background:#2c2c2c;
color:#fff;
text-align:center;
   }
</style>
<title>进制转换</title>
    <script type="text/javascript" >
    document.write("<div id=‘show‘>");
    var date=parseInt(prompt("请输入十进制数据",0));
    var base=parseInt(prompt("请输入基数(2,8,16)",2));
    var result;
    switch(base){
     case 2:
  case 8:
  case 16: result = date.toString(base);break;
  default: result = "<span style=‘color:red‘>非法</span>"
  }
    document.write(result);
    document.write("</div>");

</script>
</head>
<body>

</body>
</html>

js实现css标记显示

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