Javascript method to hide the drop-down menu: first create a "demo.html" and "demo.css"; then create a "demo.js"; finally pass "function hideSubMenu(li) {...} "Just hide it.
The operating environment of this article: windows7 system, javascript version 1.8.5, Dell G3 computer.
How to hide the drop-down menu in javascript?
javascript implements display and hiding of drop-down menu
demo.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>实现下拉菜单效果</title> <link rel="stylesheet" type="text/css" href="demo.css"> <script type="text/javascript" src="demo.js"></script> </head> <body> <p id="nav"> <ul> <li><a href="#">首页</a></li> <li onmouseover="displaySubMenu(this)" onmouseout="hideSubMenu(this)"><a href="#">课程大厅</a> <ul> <li><a href="#">JavaScript</a></li> <li><a href="#">Html/CSS</a></li> </ul> </li> <li onmouseover="displaySubMenu(this)" onmouseout="hideSubMenu(this)"><a href="#">学习中心</a> <ul> <li><a href="#">视频学习</a></li> <li><a href="#">实例练习</a></li> <li><a href="#">问与答</a></li> </ul> </li> <li><a href="#">经典案例</a></li> <li><a href="#">关于我们</a></li> </ul> </p> </body> </html>
demo.js
function displaySubMenu(li) { var subMenu = li.getElementsByTagName("ul")[0]; subMenu.style.display = "block"; } function hideSubMenu(li) { var subMenu = li.getElementsByTagName("ul")[0]; subMenu.style.display = "none"; }
demo.css
*{ margin:0px; padding:0px;} body{ font-family:Verdana, Geneva, sans-serif; font-size:14px;} #nav{ width:600px; height:40px; background-color:#eee; margin:0 auto;} ul{ list-style:none;} ul li{ float:left; line-height:40px; text-align:center; width:100px;} a{ text-decoration:none; color:#000; display:block;} a:hover{ color:#F00; background-color:#666;} ul li ul li{ float:none;background-color:#eee; margin:2px 0px;} ul li ul{ display:none;}
Effect:
Recommended study: "javascript Advanced Tutorial"
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