Correction status:Uncorrected
Teacher's comments:
王者荣耀相册:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>实战王者荣耀相册</title> <style type="text/css"> .box{ width: 560px; height: 600px; border: 1px solid gray; box-shadow: 4px 4px 4px lightgray; /* margin-left: 100px; margin-top:50px;*/ margin: 30px auto; text-align:center; background-color: #87f1fa52; } /*.box h2{ text-align: center; color: lightgreen; }*/ .box ul{ /*将ul转为BFC独立块,使之不受内部浮动元素的影响*/ overflow: hidden; padding: 0; margin: 0; } .box ul li{ float: left; list-style-type: none; background-color: skyblue; margin-left: 10px; } .box ul li a{ /*将a转为块元素,并设置为li的宽高,这样可以使整个li可以被点击*/ display: block; width: 100px; height: 30px; color: white; text-align: center; line-height: 30px; text-decoration: none; } .box ul li a:hover{ font-size: 1.1em; color: black; font-weight: bolder; } .box .pic{ width: 400px; height: 400px; border: 1px solid black; /*消除img标签底部的空间区*/ line-height: 1px; margin:auto; margin-top:50px; } .box .pic img{ width: 100%; height: 100%; } </style> </head> <body> <!-- 知识点: 1.js代码可以写在哪里? 2.js如何调用? 3.js函数的使用语法 --> <div class="box"> <h2>王者荣耀相册</h2> <ul> <!-- <li><a href="../images/mkbl.jpg" onclick="document.getElementById('img').src = this.href;return false">马可</a></li> --> <li><a href="../images/mkbl.jpg" title="奥巴马" onclick="changePic(this);return false;">马可</a></li> <li><a href="../images/k.jpg" title="凯就是凯" onclick="changePic(this);return false;">凯凯</a></li> <li><a href="../images/cc.jpg" title="曹操贼66666" onclick="changePic(this);return false;">曹操</a></li> <li><a href="../images/yz.jpg" title="嬴政还是可以的" onclick="changePic(this);return false;">嬴政</a></li> <li><a href="../images/lb.jpg" title="只知道床前明月光" onclick="changePic(this);return false;">李白</a></li> </ul> <div class="pic"> <img src="../images/zwt.png" alt="图片" id="img"> </div> <p id="info"></p> </div> <script type="text/javascript"> function changePic(pic){ //获取一个英雄图片与后面的文字 var picUrl = pic.href var picInfo = pic.title var picName = pic.innerHTML //获取到要被替换掉的对象 var img = document.getElementById('img') var p = document.getElementById('info') //将对应的占位符对象进行替换 img.src = picUrl p.innerHTML = '<strong>'+'<em>' +'<span style="color:red">' + picName + ' : ' +picInfo + '</span>'+'</em>' +'</strong>' } </script> </body> </html>
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迷你计算机:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>2.实战-迷你计算机</title> <style type="text/css"> .box{ width: 500px; height: 200px; border: 1px solid gray; box-shadow: 4px 4px 4px lightgray; margin: 30px auto; text-align:center; background-color: #87f1fa52; } table{ margin: auto; /*border: 1px solid green;*/ } td{ /*border: 1px solid red;*/ width: 100px; height: 30px; padding: 5px 10px; } input , select{ width: 100%; height: 100%; border: none; text-align: center; } button{ width: 100%; height: 100%; border: none; background-color: skyblue; color: white; } button:hover{ background-color: red; width: 105%; height: 105%; cursor: pointer; } </style> </head> <body> <!-- 知识点: 1.获取页面元素的方法 2.条件判断语句 3.事件函数的用法 --> <div class="box"> <h2>迷你计算机</h2> <form> <table> <tr> <td><input type="text" name="number1" placeholder="数字1"></td> <td> <select name="option"> <option value="null">请选择</option> <option value="add">+</option> <option value="sub">-</option> <option value="mul">*</option> <option value="div">/</option> </select> </td> <td><input type="text" name="number2" placeholder="数字2"></td> <td><button type="button">计算</button></td> </tr> <tr> <td colspan="2" align="right"><h3>结果:</h3></td> <td colspan="2" align="left"><h3 id="placeholder"></h3></td> </tr> </table> </form> </div> <script type="text/javascript"> //第一步获取操作数,按钮,结果占位符 var num1 = document.getElementsByName('number1')[0] var option = document.getElementsByName('option')[0] var num2 = document.getElementsByName('number2')[0] var button = document.getElementsByTagName('button')[0] var placeholder = document.getElementById('placeholder') //第二步给按钮添加事件,执行计算 button.onclick = function(){ if(num1.value.length==0){ alert('第一个框不能为空') // 焦点返回文本框中 num1.focus() return false } else if(isNaN(num1.value)){ alert('第一个框只能是数字') num1.focus() return false }else if(num2.value.length==0){ alert('第二个框不能为空') // 焦点返回文本框中 num2.focus() return false } else if(isNaN(num2.value)){ alert('第二个框只能是数字') num2.focus() return false } else{ // 用parseFloat函数把字符串转为浮点数 var data1 = parseFloat(num1.value) var data2 = parseFloat(num2.value) } var opt = option.value // 声明临时变量 var temp = 0 //保存当前操作 + - * / var flag = '' switch(opt){ case 'null': alert('请选择运算符') option.focus() return false case 'add': flag = '+' temp = data1 + data2 break case 'sub': flag = '-' temp = data1 - data2 break case 'mul': flag = '*' temp = data1 * data2 break case 'div': flag = '/' if (data2==0) { alert('除数不能为0') return false } else{ temp = data1 / data2 } break } // placeholder.innerHTML= '<span style="color:red">'+data1 + '' +flag+''+data2 + '=' + temp+'</span>' var str ='<span style="color:red">' str += data1 + '' +flag+''+data2 + '=' + temp str +='</span>' placeholder.innerHTML = str } </script> </body> </html>
点击 "运行实例" 按钮查看在线实例
迷你计算机手写代码: