这个实验怎么写，哭(இдஇ; )

img

<body>
    <input name="name" id="name" />
    <input type="password" name="password" id="password" />
    <button onclick="submit()">登录</button>
    <!-- 表单的样式自己优化一下 -->
</body>
<script type="text/javascript">
    var name = '张三',sex = '男',age = 18;
    document.write(name,sex,age);
    
    var height = 10,width = 5;
    document.write(height*width);
    
    var arr = [1,2,3,4],sum = 0;
    for(let i = 0; i < arr.length; i++) {
        sum += arr[i];
    }
    document.write(sum);
    
    var date = new Date,hour = date.getHours();
    if(hour >= 23 || hour < 5) {
        document.write('网虫：该休息了，明天还有课呢！')
    }else if(hour >= 5 && hour < 8) {
        document.write('早上好')
    }else if(hour < 12) {
        document.write('上午好');
    }else if(hour < 18) {
        document.write('下午好');
    }else if(hour < 21) {
        document.write('晚上好');
    }else if(hour < 23) {
        document.write('祝你晚安');
    }
    
    var sum = 0;
    for(let i = 1; i <= 100; i++) {
        if(i%2 == 0) {
            sum += i;
            continue;
        }
    }
    document.write(sum)
    
    for(let i = 5; i > 0; i--) {
        for(let j = 0; j < i; j++) {
            document.write('*');
        }
        document.write('<br />')
    }
    
    var number = '';
    for(let i = 0; i < 4; i++){
        number += Math.floor(Math.random()*10)
    }
    document.write(number);
    
    function submit() {
        var name = document.getElementById('name').value,
        password = document.getElementById('password').value;
        if(name == '' || password == '') {
            alert('输入用户名或密码')
        }else {
            alert('可以提交')
        }
    }
</script>

好好学习一下js吧，这都挺简单的