第十五次作业

Posted 2020-10-12 037吴宜珊

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title> 函数</title>
    <script>
        function displayDate() {
            document.getElementById("demo").innerHTML=Date();
        }
    </script>
    <script src="24.js"></script>
</head>
<body>
<p id="demo">ppp</p>
     <script>
         document.write(Date());
         document.getElementById("demo").innerHTML=Date();
     </script>

<buttom type="button" onclick=window.alert("number")>press</buttom>
</body>
</html>

function myFunction(){
document.getElementByld("demo").innerHTML="javascript函数";
}

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title> 函数</title>
    <script>
        function displayDate() {
            document.getElementById("demo").innerHTML=Date();
        }
    </script>
    <script src="24.js"></script>
</head>
<body>
<p id="demo">ppp</p>
     <script>
         document.write(Date());
         document.getElementById("demo").innerHTML=Date();
     </script>

<buttom type="button" onclick=window.alert("number")>press</buttom>
</body>
</html>

3.—6

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>登录</title>
    <script>
        function fnlogin() {
            var oUname=document.getElementById("uname")
            var oError=document.getElementById("error_box")
            if (oUname.value.length<6){
                oError.innerHTML="用户名至少6位"
            }
            if(oUname.value.length>6&opassward.value.length<6){
                oError.innerHTML="密码至少为6位"
            }
        }
    </script>
</head>
<body>
<div class="box" >
    <h2>登录</h2>
    <div class="input_box">
        <input id="uname" type="text" placeholder="请输入用户名">
    </div>
    <div class="input_box">
        <input id="upass" type="password" placeholder="请输入密码">
    </div>
    <div id="error_box"><br></div>
    <div class="input_box">
        <button onclick="fnlogin()">登录</button>
    </div>
</div>
</body>

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