大佬教程收集整理的这篇文章主要介绍了JavaScript实现横向滑出的多级菜单效果，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。
本文实例讲述了JavaScript实现横向滑出的多级菜单效果。分享给大家供大家参考。具体如下：
这是一款JavaScript横向滑出的多级菜单，只用鼠标放上就可以动画出现二级菜单，整体设计精美，大气，博客上也可以用哦。
运行效果截图如下：
在线演示地址如下：
http://demo.jb51.net/js/2015/js-hx-show-menu-style-demo/
具体代码如下：
<!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=gb2312" /> <title>JavaScript横向滑出的多级菜单</title> <style> * {padding:0; margin:0} body {font:12px Verdana,Arial,Helvetica} #wrapper {width:750px; padding:25px; margin:0 auto} #leftcolumn {float:left; width:225px} #rightcolumn {float:left; width:525px} .dropdown {display:block; position:relativE} .dropdown dt {width:188px; border:2px solid #9ac1c9; padding:8px; font-weight:bold; cursor:pointer; BACkground:url(images/header.gif)} .dropdown .upperdd {Border-bottom:nonE} .dropdown dt:hover {BACkground:url(images/header_over.gif)} .dropdown dd {position:absolute; top:0; overflow:hidden; width:208px; display:none; BACkground:#fff; opacity:0} .dropdown ul {width:204px; border:2px solid #9ac1c9; list-style:nonE} .dropdown li {display:inlinE} .dropdown a,.dropdown a:active,.dropdown a:visited {display:block; padding:5px; color:#333; text-decoration:none; BACkground:#eaf0f2; width:194px} .dropdown a:hover {BACkground:#d9e1e4; color:#000} .dropdown .underline {Border-bottom:1px solid #b9d6dc} </style> <script type="text/javascript"> var DDSPEED = 10; var DDTIMER = 15; var OFFSET = -2; var ZINT = 100; function ddMenu(id,d){ var h = document.getElementById(id + '-ddheader'); var c = document.getElementById(id + '-ddcontent'); clearInterval(c.timer); if(d == 1){ clearTimeout(h.timer); c.style.display = 'block'; if(c.maxh && c.maxh <= c.offsetHeight){return} else if(!c.maxh){ c.style.left = (h.offsetWidth + OFFSET) + 'px'; c.style.height = 'auto'; c.maxh = c.offsetHeight; c.style.height = '0px'; } ZINT = ZINT + 1; c.style.zIndex = ZINT; c.timer = seTinterval(function(){ddSlide(c,1)},DDTIMER); }else{ h.timer = setTimeout(function(){ddCollapse(C)},50); } } function ddCollapse(C){ c.timer = seTinterval(function(){ddSlide(c,-1)},DDTIMER); } function cancelHide(id){ var h = document.getElementById(id + '-ddheader'); var c = document.getElementById(id + '-ddcontent'); clearTimeout(h.timer); clearInterval(c.timer); if(c.offsetHeight < c.maxh){ c.timer = seTinterval(function(){ddSlide(c,DDTIMER); } } function ddSlide(c,d){ var currh = c.offsetHeight; var dist; if(d == 1){ dist = Math.round((c.maxh - currh) / DDSPEED); }else{ dist = Math.round(currh / DDSPEED); } if(dist <= 1 && d == 1){ dist = 1; } c.style.height = currh + (dist * d) + 'px'; c.style.opacity = currh / c.maxh; c.style.filter = 'alpha(opacity=' + (currh * 100 / c.maxh) + ')'; if(currh > (c.maxh - 2) && d == 1){ clearInterval(c.timer); }else if(dist < 1 && d != 1){ clearInterval(c.timer); c.style.display = 'none'; } } </script> </head> <body> <div id="wrapper"> <div id="leftcolumn"> <dl class="dropdown"> <dt id="one-ddheader" class="upperdd" onmouseover="ddMenu('one',1)" onmouseout="ddMenu('one',-1)">我们首页</dt> <dd id="one-ddcontent" onmouseover="cancelHide('one')" onmouseout="ddMenu('one',-1)"> <ul> <li><a href="#" class="underline">脚本主页</a></li> <li><a href="#" class="underline">网页特效</a></li> <li><a href="#">脚本下载</a></li> </ul> </dd> </dl> <dl class="dropdown"> <dt id="two-ddheader" class="upperdd" onmouseover="ddMenu('two',1)" onmouseout="ddMenu('two',-1)">网站导航</dt> <dd id="two-ddcontent" onmouseover="cancelHide('two')" onmouseout="ddMenu('two',-1)"> <ul> <li><a href="#" class="underline">ASP</a></li> <li><a href="#" class="underline">php</a></li> <li><a href="#" class="underline">.NET</a></li> <li><a href="#">网站留言</a></li> </ul> </dd> </dl> <dl class="dropdown"> <dt id="three-ddheader" class="upperdd">最新下载</dt> </dl> <dl class="dropdown"> <dt id="four-ddheader" onmouseover="ddMenu('four',1)" onmouseout="ddMenu('four',-1)">欢迎回来</dt> <dd id="four-ddcontent" onmouseover="cancelHide('four')" onmouseout="ddMenu('four',-1)"> <ul> <li><a href="#" class="underline">欢迎再来</a></li> <li><a href="#">慢走，不送</a></li> </ul> </dd> </dl> </div> </div> </body> </html>
希望本文所述对大家的JavaScript程序设计有所帮助。
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