JavaScript事件

最新推荐文章于 2025-02-19 09:09:27 发布

原创最新推荐文章于 2025-02-19 09:09:27 发布 · 129 阅读

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在HTML中引用(指定)事件处理函数

<!DOCTYPE html>
<html>
  <head>
    <title>ch02_9.html</title>
	
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="this is my page">
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    
    <!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
<title>单击按钮事件示例</title>
<script language="javascript">
  function test(){
    window.alert("事件引发一操作,并成功执行了这个操作");
  }
</script>
  </head>
  
  <body>
     <form action="">
     <input type="Button" value="警告对话框" onclick="test()"><br/>
     </form>
  </body>
</html>

输入验证要求

用户名:用户名是否为空,是否符合规定的格式(用户名由字母开头，后跟字母，数字，或者下划线)

密码:密码长度是否超过6，两次密码输入是否一致

邮箱地址:邮箱地址必须符合邮箱格式

function validate(){
   var name=document.forms[0].userName.value;
   var pwd=document.forms[0].userPwd.value;
   var pwd1=document.forms[0].userPwd1.value;
   var email=document.forms[0].userEmail.value;
   var accept=document.forms[0].accept.checked;
   var regl=/[a-zA-Z]w*/;
   var reg2=^w+([-+.']\w+)*@\w+([-.]\w+)*.\w+([-.]\w+)*/;
   if(name.length<=0)
     alert("用户名不能为空");
   else if(!regl.test(name))
     alert("用户名格式不正确");
   else if(pwd.length<6)
     alert("密码长度必须大于等于6!");
   else if(pwd!=pwd1)
     alert("两次密码不一致");
   else if(!reg2.test(email))
     alert("邮件格式不正确!");
   else if(accept==false)
     alert("您需要仔细阅读并同意接受用户使用协议");
   else document.forms[0].submit();
}

JavaScript+CSS+DIV实现下拉菜单

<!DOCTYPE html>
<html>
  <head>
    <title>ch02_11.html</title>
	
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="this is my page">
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    
    <!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
<title>下拉菜单示例</title>
<script language="javaScript">
    //当鼠标移动到菜单选项的实话显示对应的DIV
   function show(menu){
    document.getElementById(menu).style.visibility="visible";
   }
   //当鼠标移出时隐藏所有的DIV
   function hide(){
     document.getElementById("menu1").style.visibility="hidden";
     document.getElementById("menu2").style.visibility="hidden";
     document.getElementById("menu3").style.visibility="hidden";
   }
</script>
  </head>
  
  <body>
  <table>
  <tr bgcolor="#9999FF" align="center">
  <td width="120" onMouseMove="show('menu1')" onMouseOut="hide()">系列课程</td>
  <td width="120" onMouseMove="show('menu2')" onMouseOut="hide()">教学课件</td>
  <td width="120" onMouseMove="show('menu3')" onMouseOut="hide()">课程大纲</td>
  </tr>
  </table>
  <div id="menu1" onMouseMove="show('menu1')" onMouseOut="hide()" 
  style="background:#9999FF;
  position:absolute;
  left:12;
  top:38;
  width:120;
  visibility:hidden;
  ">
  <span>c++程序设计</span><br>
  <span>java程序设计</span><br>
  <span>c程序设计</span><br>
  </div>
  
  <div id="menu2" onMouseMove="show('menu2')" onMouseOut="hide()" 
  style="background:#9999FF;
  position:absolute;
  left:137;
  top:38;
  width:120;
  visibility:hidden;
  ">
  <span>c++课件</span><br>
  <span>java课件</span><br>
  <span>c课件</span><br>
  </div>
  
  <div id="menu3" onMouseMove="show('menu3')" onMouseOut="hide()" 
  style="background:#9999FF;
  position:absolute;
  left:260;
  top:38;
  width:120;
  visibility:hidden;
  ">
  <span>c++教学大纲</span><br>
  <span>java教学大纲</span><br>
  <span>c教学大纲</span><br>
  </div>
  </body>
</html>

JavaScript+CSS+DIV实现下表格变色

<!DOCTYPE html>
<html>
  <head>
    <title>ch02_12.html</title>
	
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="this is my page">
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    
    <!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
<title>变色表格示例</title>
<script language="javaScript">
       function changeColor(row){
        document.getElementById(row).style.backgroundColor='#CCCCFF';
       }
       function reset(row){
        document.getElementById(row).style.backgroundColor='';
       }
</script>
  </head>
  
  <body>
     <table width="200" border="1" cellspacing="1" cellpadding="1" align="center">
     <tr><th>学校</th><th>专业</th><th>人数</th></tr>
     
     <tr align="center" id="row1" onMouseOver="changeColor('row1')" onMouseOut="restColor('row1')">
     <th>北大</th><th>法律</th><th>2000</th>
     </tr>
     
     <tr align="center" id="row2" onMouseOver="changeColor('row2')" onMouseOut="restColor('row2')">
     <th>清华</th><th>计算机</th><th>5000</th>
     </tr>
    
     <tr align="center" id="row3" onMouseOver="changeColor('row3')" onMouseOut="restColor('row3')">
     <th>人大</th><th>经济</th><th>6000</th>
     </tr>
  </body>
</html>