tryjs_ifthen 在线代码实例

实例代码( Tip: 登录后体验更佳 )
运行代码

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>W3Cschool教程(w3cschool.cn)</title>
</head>
<body>
<p>如果时间早于 20:00，会获得问候 "Good day"。</p>
<button onclick="myFunction()">点击这里</button>
<p id="demo"></p>
<script>
function myFunction(){
    var x="";
    var time=new Date().getHours();
    if (time<20){
        x="Good day";
        }
    document.getElementById("demo").innerHTML=x;
}
</script>
</body>
</html>
 
 
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运行结果
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