JavaScript实现横向滑出的多级菜单效果

2019-11-20 11:29:07

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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.VeVB.COm/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,1)},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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