案例：javascript案例     状态：可编辑再运行    进入竖版
 运行结果　
​x
 
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<!DOCTYPE html>
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<html>
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<body>
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​
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<p>点击下面的按钮来显示今天是周几：</p>
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​
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<button onclick="myFunction()">点击这里</button>
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​
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<p id="demo"></p>
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​
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<script>
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function myFunction()
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{
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var x;
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var d=new Date().getDay();
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switch (d)
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  {
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  case 0:
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    x="Today it's Sunday";
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    break;
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  case 1:
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    x="Today it's Monday";
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    break;
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  case 2:
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    x="Today it's Tuesday";
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    break;
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  case 3:
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    x="Today it's Wednesday";
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    break;
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  case 4:
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    x="Today it's Thursday";
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    break;
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  case 5:
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    x="Today it's Friday";
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    break;
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  case 6:
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    x="Today it's Saturday";
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    break;
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  }
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document.getElementById("demo").innerHTML=x;
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}
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</script>
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​
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</body>
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</html>
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​