点击按钮没反应，看了几次代码觉得没问题

源自：4-1 编程挑战

点击按钮没反应，看了几次代码觉得没问题

<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" Content="text/html; charset=utf-8" />
<title>javascript</title>
<style type="text/css">
body{font-size:12px;}
#txt{    height:400px;    width:600px;  border:#333 solid 1px;  padding:5px;}
p{  line-height:18px;  text-indent:2em;}
</style>
</head>
<body>  
<h2 id="hcon">JavaScript课程</H2>  
<div id="txt">      
<h5>JavaScript为网页添加动态效果并实现与用户交互的功能。</h5>        
<p>1. JavaScript入门篇，让不懂JS的你，快速了解JS。</p>        
<p>2. JavaScript进阶篇，让你掌握JS的基础语法、函数、数组、事件、内置对象、BOM浏览器、DOM操作。</p>        
<p>3. 学完以上两门基础课后，在深入学习JavaScript的变量作用域、事件、对象、运动、cookie、正则表达式、ajax等课程。</p>
</div>  
<form>  
<!--当点击相应按钮，执行相应操作，为按钮添加相应事件-->    
<input type="button" value="改变颜色" onclick="changeColor()">      
<input type="button" value="改变宽高" onclick="changeHeight()" >    
<input type="button" value="隐藏内容" onclick="hiddenText()">    
<input type="button" value="显示内容" onclick="showText()">    
<input type="button" value="取消设置" onclick="unset()">  
</form>  
<script type="text/javascript">
//定义"改变颜色"的函数   
function changeColor()   
{      var mychar=document.getElementById("hcon");
      mychar.style.color="red";      
      mychar.style.backgroundColor="#CCC";
         }
         //定义"改变宽高"的函数   
         function changeHeight()   
         {      var mychar=document.getElementById("hcon");      
         mychar.style.width="600px";
               mychar.style.height="400px";   }
               //定义"隐藏内容"的函数   
               function hiddenText()   {
                      var mychar=document.getElementById("hcon");
                            mychar.style.display="hnone"；   }
                            //定义"显示内容"的函数   
                            function showText()   
                            {       var mychar=document.getElementById("hcon");
                                  mychar.style.display="block";
                                     }
                                     //定义"取消设置"的函数   
                                     function unset()   {
                                            var mychar=confirm("是否取消设置")；
                                                   if(mychar==true)       
                                                   {           
                                                   document.getElementById("hcon").className="txt";       
                                                   }       
                                                   else       
                                                   {                  
                                                   }   
                                                   }  
                                                </script>
                                                   </body>
                                                   </html>

提问者：小蜗牛牛 2019-06-26 15:53

个回答

我埋葬的地方就有我

2019-06-26 20:18:45

已采纳

你有几个两个地方的分号错了是中文的
44 mychar.style.display="hnone"； } //属性值错了

1

我埋葬的地方就有我: 2019-06-26 20:17:25

<!DOCTYPE HTML><html><head><meta http-equiv="Content-Type" Content="text/html; charset=utf-8" /><title>javascript</title><style type="text/css">body{font-size:12px;}#txt{    height:400px;    width:600px;  border:#333 solid 1px;  padding:5px;}p{  line-height:18px;  text-indent:2em;}</style></head><body>  <h2 id="hcon">JavaScript课程</h2>  <div id="txt">      <h5>JavaScript为网页添加动态效果并实现与用户交互的功能。</h5>        <p>1. JavaScript入门篇，让不懂JS的你，快速了解JS。</p>        <p>2. JavaScript进阶篇，让你掌握JS的基础语法、函数、数组、事件、内置对象、BOM浏览器、DOM操作。</p>        <p>3. 学完以上两门基础课后，在深入学习JavaScript的变量作用域、事件、对象、运动、cookie、正则表达式、ajax等课程。</p></div>  <form>  <!--当点击相应按钮，执行相应操作，为按钮添加相应事件-->    <input type="button" value="改变颜色" onclick="changeColor()"/>      <input type="button" value="改变宽高" onclick="changeHeight()"/>    <input type="button" value="隐藏内容" onclick="hiddenText()"/>    <input type="button" value="显示内容" onclick="showText()"/>    <input type="button" value="取消设置" onclick="unset()"/>  </form>  <script type="text/javascript">//定义"改变颜色"的函数   function changeColor()   {      var mychar=document.getElementById("hcon");      mychar.style.color="red";            mychar.style.backgroundColor="#CCC";         }         //定义"改变宽高"的函数            function changeHeight()            {      var mychar=document.getElementById("hcon");               mychar.style.width="600px";               mychar.style.height="400px";   }               //定义"隐藏内容"的函数                  function hiddenText()   {                      var mychar=document.getElementById("hcon");                            mychar.style.display="none";  }                            //定义"显示内容"的函数                               function showText()                               {       var mychar=document.getElementById("hcon");                                  mychar.style.display="block";                                     }                                     //定义"取消设置"的函数                                        function unset()   {                                            var mychar=confirm("是否取消设置");                                                   if(mychar==true)                                                          {                                                              document.getElementById("hcon").className="txt";                                                          }                                                          else                                                          {                                                                     }                                                      }                                                  </script>                                                   </body>                                                   </html>

程序猿廖宜聪

2019-06-26 19:54:09

我遇到和你一样的问题

0