JavaScript實現帶箭頭標識的多級下拉菜單效果
編輯：關於JavaScript
本文實例講述了JavaScript實現帶箭頭標識的多級下拉菜單效果。分享給大家供大家參考。具體如下：
這是一個支持多級顯示的JS菜單，鼠標移向帶有小三角的菜單項，可下拉出二級子菜單項，在該主菜單的上方會顯示標記，指引當前的位置，本菜單代碼使用了一個JS類，可根據代碼地址自行下載，這個菜單未在網上測試，用在自己的網站裡可能要修改代碼。
運行效果截圖如下：
在線演示地址如下：
http://demo.jb51.net/js/2015/js-focus-m-select-menu-nav-codes/
具體代碼如下：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>多級展開的橫向菜單</title>
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#imenus0 li:hover .imeam span,#imenus0 li a.iactive .imeamj span {background-image:url(images/sample3_main_arrow.gif); background-repeat:no-repeat;background-position:top left;}
#imenus0 ul .imeas span,#imenus0 ul .imeasj span {background-image:url(images/sample3_sub_arrow.gif); width:5px; height:7px; left:-5px; top:3px; background-repeat:no-repeat;background-position:top left;}
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</style><!--end-->
</head>
<body>
<div class="imrcmain0 imgl" style="width:580px;z-index:999999;position:relative;"><div class="imcm imde" id="imouter0"><ul id="imenus0">
<li class="imatm" style="width:145px;"><a class="" href="#"><span class="imea imeam"><span></span></span>Who We Are</a>
<div class="imsc"><div class="imsubc" style="width:145px;top:0px;left:0px;"><ul style="">
<li><a href="#">Overview</a></li>
<li><a href="#">Mission & Goals</a></li>
<li><a href="#">History</a></li>
<li><a href="#">Management</a></li>
<li><a href="#">Working at Tyco</a></li>
<li><a href="#">Press Center</a></li>
<li><a href="#"><span class="imea imeas"><span></span></span>Worldwide</a>
<div class="imsc"><div class="imsubc" style="width:140px;top:-23px;left:132px;"><ul style="">
<li><a href="#">Europe</a></li>
<li><a href="#">Asia</a></li>
<li><a href="#">US & Canada</a></li>
<li><a href="#">Mexico</a></li>
<li><a href="#">Australia</a></li>
<li><a href="#">Middle East</a></li>
</ul></div></div></li>
<li><a href="#"><span class="imea imeas"><span></span></span>Board of Directors</a>
<div class="imsc"><div class="imsubc" style="width:140px;top:-23px;left:132px;"><ul style="">
<li><a href="#">Overview</a></li>
<li><a href="#">Electronics</a></li>
<li><a href="#">Fire & Security</a></li>
<li><a href="#">Healthcare</a></li>
<li><a href="#">Plastics & Adhesives</a></li>
<li><a href="#">Engineered Producs</a></li>
<li><a href="#">Tyco Worldwide</a></li>
</ul></div></div></li>
<li><a href="#">Customers</a></li>
</ul></div></div></li>
<li class="imatm" style="width:145px;"><a href="#"><span class="imea imeam"><span></span></span>Our Commitment</a>
<div class="imsc"><div class="imsubc" style="width:146px;top:0px;left:-1px;"><ul style="">
<li><a href="#">Overview</a></li>
<li><a href="#">People & Values</a></li>
<li><a href="#">Governance</a></li>
<li><a href="#">Community</a></li>
<li><a href="#">Environmental</a></li>
</ul></div></div></li>
<li class="imatm" style="width:145px;"><a href="#"><span class="imea imeam"><span></span></span>Our Business</a>
<div class="imsc"><div class="imsubc" style="width:146px;top:0px;left:0px;"><ul style="">
<li><a href="#">Overview</a></li>
<li><a href="#">Electronics</a></li>
<li><a href="#">Fire & Security</a></li>
<li><a href="#">Healthcare</a></li>
<li><a href="#">Plastics & Adhesives</a></li>
<li><a href="#">Engineered Producs</a></li>
<li><a href="#">Tyco Worldwide</a></li>
</ul></div></div></li>
<li class="imatm" style="width:145px;"><a href="#"><span class="imea imeam"><span></span></span>Investors</a>
<div class="imsc"><div class="imsubc" style="width:146px;top:0px;left:-1px;"><ul style="">
<li><a href="#">Overview</a></li>
<li><a href="#">Stock Quotes</a></li>
</ul></div></div></li>
</ul><div class="imclear"> </div></div></div>
<script language="JavaScript" src="images/ocscript.js" type="text/javascript"></script>
</body>
</html>
希望本文所述對大家的javascript程序設計有所幫助。
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