本文实例讲述了JS+CSS实现大气的黑色首页导航菜单效果代码。分享给大家供大家参考。具体如下：
这是一款JS+CSS实现的大气的重色+红色高强对比的菜单，可用作首页导航菜单，从设计的角度来讲，挺专业，从实用角度来讲，应用广泛，是款人见人爱的经典风格菜单，超不错的一个作品。
运行效果截图如下：
在线演示地址如下：
http://demo.jb51.net/js/2015/js-css-black-style-nav-menu-codes/
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>大气的黑色CSS首页导航菜单</title> <style> body,div,form,ul,li,span{margin:0;padding:0; list-style-type:none;} body {text-align:center;color:#444;font-family:"宋体";font-size:12px; background:url(images/bodybg.jpg) top repeat-x;} img {border:0px;} .ml12{margin-left:12px; display:inline} a,a:Link,a:visited{font-size:12px;color:#444; text-decoration:none} a:hover{color:#FF3300; text-decoration:underline;} .nav{width:1000px;float:left} .nav ul{width:1000px;float:left;} .nav li{width:100px;float:left; height:38px; line-height:38px;margin-right:20px; display:inline;} .nav li a:link,.nav li a:visited{color:#E4E4E4;font-size:14px;font-weight:bold;} .nav li a:hover{ text-decoration:none;width:100px;float:left; height:38px; line-height:38px; background:url(images/home-bg.jpg)} /*主导航菜单*/ #menu ul{ padding:0; border:0; list-style:none; line-height:38px; margin-top: 0; margin-right: 0; margin-bottom: 0; margin-left: 15px; float:left; } #menu_out{ width:1000px;float:left; margin-top:107px; padding-left:3px; margin-left:auto; margin-right:auto; height:38px; overflow:hidden; } #menu_in{ padding-right:4px; } #menu{ height:38px; } #nav{ padding-left:20px; } #nav li{ float:left; height:38px; margin-left:5px;margin-right:5px; } #nav li a{ float:left; display:block; padding-left:6px; height:38px; cursor:pointer; text-decoration:none; text-align:center; } #nav li a span{ float:left; width:100px; line-height:38px; font-size:14px; font-weight:bold; color:#FFFFFF; text-decoration:none; text-align:center; } #nav li .nav_on{ /*鼠标经过时变换背景，方便JS获取样式*/ background-position:left 100%; } #nav li .nav_on span{ /*鼠标经过时变换背景，方便JS获取样式*/ background-position:right 100%; color:#fff; text-decoration:none; width:100px;background:url(images/home-bg.jpg) no-repeat; } .nav-bot{width:1000px;float:left; height:20px;overflow:hidden; line-height:20px; padding-top:12px; padding-bottom:10px;} .nav-botinfo{width:680px;background:url(images/ico01.jpg) no-repeat left;text-align:left;padding-left:20px;margin-left:10px; display:inline;color:#9F9F9F;} </style> <script type="text/javascript"> function qiehuan(num){ for(var id = 0;id<=7;id++) { if(id==num) { document.getElementById("qh_con"+id).style.display="block"; document.getElementById("mynav"+id).className="nav_on"; } else { document.getElementById("qh_con"+id).style.display="none"; document.getElementById("mynav"+id).className=""; } } } </script> </head> <body> <div id=menu_out> <div id=menu_in> <div id=menu> <UL id=nav> <li><A class=nav_on id=mynav0 onmouseover=javascript:qiehuan(0) href="#"><SPAN>网站首页</SPAN></A></li> <li><a href="#" onmouseover="javascript:qiehuan(1)" id="mynav1"><span>网站模板</span></a></li> <li><a href="#" onmouseover="javascript:qiehuan(2)" id="mynav2"><span>后台模板</span></a></li> <li><a href="#" onmouseover="javascript:qiehuan(3)" id="mynav3"><span>CSS菜单</span></a></li> <li><a href="#" onmouseover="javascript:qiehuan(4)" id="mynav4"><span>脚本下载</span></a></li> <li><a href="#" onmouseover="javascript:qiehuan(5)" id="mynav5"><span>网页特效</span></a></li> <li><a href="#" onmouseover="javascript:qiehuan(6)" id="mynav6"><span>新闻中心</span></a></li> <li><a href="#" onmouseover="javascript:qiehuan(7)" id="mynav7"><span>联系我们</span></a></li> </UL> <div id=menu_con> <div id=qh_con0></div> <div id=qh_con1></div> <div id=qh_con2></div> <div id=qh_con3></div> <div id=qh_con4></div> <div id=qh_con5></div> <div id=qh_con6></div> <div id=qh_con7></div> </div> </div> </div> </div> </body> </html>
希望本文所述对大家的JavaScript程序设计有所帮助。