本文介绍如何使用原生JavaScript实现Tab选项卡切换功能。通过定义HTML结构，利用CSS控制样式，并编写JS代码监听点击事件，实现内容区域的动态切换。
HTML结构与CSS样式定义
<html> <head> <style type="text/css"> * { padding-bottom: 0px; margin: 0px; padding-left: 0px; padding-right: 0px; font-size: 12px; padding-top: 0px; } BODY { padding-left: 20px; padding-top: 20px; } .wid240 { width: 242px; margin-bottom: 20px; } .wid180 { width: 182px; } .tab { border-bottom: #000 1px solid; border-left: #000 1px solid; border-top: #000 1px solid; border-right: #000 1px solid; } .tab UL { zoom: 1; clear: both; } .tab UL:after { display: block; height: 0px; visibility: hidden; clear: both; content: ""; } .tab UL LI { text-align: center; line-height: 26px; width: 60px; display: inline; background: #000; float: left; height: 26px; color: #fff; } .tab UL LI.on { background: #fff; color: #000; } .tabList { border-bottom: #000 1px solid; border-left: #000 1px solid; height: 150px; border-top: #000 1px; border-right: #000 1px solid; } .tabList .one { padding-bottom: 10px; padding-left: 10px; padding-right: 10px; display: none; color: #ff0000; padding-top: 10px; } .tabList .block { display: block; } </style> <meta name="GENERATOR" content="MSHTML 8.00.7600.16535"> </head> <body> <div class="wid240"> <div class="tab"> <ul> <li id="one1" class="on" onmouseover='setTab("one",1,4)'>one1 </li> <li id="one2" onmouseover='setTab("one",2,4)'>one2 </li> <li id="one3" onmouseover='setTab("one",3,4)'>one3 </li> <li id="one4" onmouseover='setTab("one",4,4)'>one4 </li> </ul> </div> <div class="tabList"> <div id="cont_one_1" class="one block"> cont_one_1</div> <div id="cont_one_2" class="one"> cont_one_2</div> <div id="cont_one_3" class="one"> cont_one_3</div> <div id="cont_one_4" class="one"> cont_one_4</div> </div> </div> <div class="wid180"> <div class="tab"> <ul> <li id="tow1" class="on" onclick='setTab("tow",1,3)'>tow1 </li> <li id="tow2" onclick='setTab("tow",2,3)'>tow2 </li> <li id="tow3" onclick='setTab("tow",3,3)'>tow3 </li> </ul> </div> <div class="tabList"> <div id="cont_tow_1" class="one block"> cont_tow_1</div> <div id="cont_tow_2" class="one"> cont_tow_2</div> <div id="cont_tow_3" class="one"> cont_tow_3</div> </div> </div> </body> </html>JavaScript交互逻辑说明
注意：在引入外部JavaScript文件时，通常需要刷新页面以确保脚本正确加载并执行。