本文實例講述了javascript實現帶下拉子菜單的導航菜單效果。分享給大家供大家參考。具體實現方法如下：
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>帶下拉子菜單的導航菜單</title> <style type="text/css"> body { font-family: Verdana; font-size: 12px; line-height: 1.5; } a { color: #000; text-decoration: none; } a:hover { color: #F00; } #menu { width:500px; height:28px; margin:0 auto; border-bottom:3px solid #E10001;} #menu ul { list-style: none; margin: 0px; padding: 0px; } #menu ul li { float:left; margin-left:2px;} #menu ul li a { display:block; width:87px; height:28px; line-height:28px; text-align:center; font-size:14px;} #menu ul li a#current { font-weight:bold; color:#fff;} #menu ul li ul { border:1px solid #ccc; display:none; position:absolute;} #menu ul li ul li { float:none; width:87px; background:#eee; margin:0;} #menu ul li ul li a { background:none;} #menu ul li ul li a:hover { background:#333; color:#fff;} #menu ul li:hover ul { display:block;} #menu ul li.sfhover ul { display:block;} </style> <script type="text/javascript"><!-- //--><![CDATA[//><!-- function menuFix() { var sfEls = document.getElementById("menu").getElementsByTagName("li"); for (var i = 0; i < sfEls.length; i++) { sfEls[i].onmouseover = function () { this.className += (this.className.length > 0 ? " " : "") + "sfhover"; } sfEls[i].onMouseDown = function () { this.className += (this.className.length > 0 ? " " : "") + "sfhover"; } sfEls[i].onMouseUp = function () { this.className += (this.className.length > 0 ? " " : "") + "sfhover"; } sfEls[i].onmouseout = function () { this.className = this.className.replace(new RegExp("( ?|^)sfhoverb"), ""); } } } window.onload = menuFix; //--><!]]> </script> </head> <body> <div id="menu"> <ul> <li><a id="current" href="#">首頁</a></li> <li><a href="#">網頁版式</a> <ul> <li><a href="#">自適應寬度</a></li> <li><a href="#">固定寬度</a></li> </ul> </li> <li><a href="#">web教程</a> <ul> <li><a href="#">新手入門</a></li> <li><a href="#">視頻教程</a></li> <li><a href="#">常見問題</a></li> </ul> </li> <li><a href="#">web實例</a></li> <li><a href="#">常用代碼</a></li> </ul> </div> </body> </html>希望本文所述對大家的javascript程序設計有所幫助。