master

分支 (2)

管理

管理

master

change

gitee-plant
/
1.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>


</head>
<body>
    <p id="demo2"></p>
<p>
    <p id="demo3">222</p>
    <p>
        JavaScript能够直接写入HTML输出流中
</p>
<p>请输入数字。如果不是数字，浏览器会弹出提示框</p>
<input id="demo" type="text">
<p id="demo4"></p>
<script>
    var length;
    length=6;
    var a=1;
    var b=2;
    var c =1;
    var t=16+"Volen";

    document.getElementById("demo3").innerHTML=t;
    document.write("<h1>这是一个标题</h1>");
    function myFunction(){
        x=document.getElementById("demo");
        x.innerHTML="Hello JavaScript";
    }
    function myFunction1(){
        var x=document.getElementById("demo").value;
        if(x==""||isNaN(x)){
            alert("不是数字");
        }
    }
    window.alert(5+6);
    document.getElementById("demo2").innerHTML="John Doe";
    var cars = new Array();
    cars[0]="Saab";
    cars[1]="Volvo";
    cars[2]="BMW";
    for(i=0;i<cars.length;i++){
        document.write(cars[i]+"<br>");
    }
    var persion={
        firstname : "John",
        lastname  : "Doe",
        id        : 5566

    };
    document.write(persion.lastname+"<br>");
    document.write(persion["lastname"]);
    document.getElementById("demo4").innerHTML=persion.firstname+"现在"+persion.id;
</script>

<button type="button" onclick="alert('欢迎!')">点我！</button>
<button type="button" onclick="myFunction()"> 点击这里</button>
<button type="button" onclick="myFunction1()"> dd</button>
</body>


</html>