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来源:未知 时间:2015-08-03 11:38 作者:xxadmin 阅读:次
[导读] 本文讲解javascript实现向上滑行菜单如何实现 !DOCTYPEhtmlPUBLIC-//W3C//DTDXHTML1.0Transitional//ENhttp://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtdhtmlxmlns=http://www.w3.org/1999/xhtmlheadmetahttp-equiv=Content-Typecont...
本文讲解javascript实现向上滑行菜单如何实现 <!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>JS实现文字上下滑动导航</title> <style type="text/css"> body { margin:0; background:#66FF99; } ul { padding-left:0; margin:0; } li { list-style:none; } #nav { height:40px; background:#900; margin-top:50px; } #nav ul { width:240px; height:40px; margin:0 auto; } #nav li {height:40px; width:240px;} #nav a { float:left; width:240px;position:relative; height:40px; overflow:hidden; font-size:14px; color:#e0e03a; text-decoration:none; cursor:pointer; } #nav strong { float:left;width:240px; } #nav span { float:left;width:200px; padding:0 20px; height:40px; line-height:40px; background:#900; clear:both; white-space:nowrap;} #nav .active,#nav .current span { background:#600; color:#fff; } #nav .current .active { color:#e0e03a; } </style> <script> window.onload=function() { var oDiv=document.getElementById('nav'); var aStrong=oDiv.getElementsByTagName('strong'); var aA=oDiv.getElementsByTagName('a'); var iTarget=oDiv.getElementsByTagName('li')[0].offsetHeight; for(var i=0; i<aStrong.length; i++) { aA[i].style.width=aStrong[i].style.width=aStrong[i].getElementsByTagName('span')[0].offsetWidth+'px'; aStrong[i].style.position='absolute'; aStrong[i].style.top=aStrong[i].style.left=0; aStrong[i].onmouseover=function() { startMove(this, -iTarget); }; aStrong[i].onmouseout=function() { startMove(this, 0); }; } }; function startMove(obj,target) { clearInterval(obj.iTime); obj.iTime=setInterval(function(){ if(obj.offsetTop==target) { clearInterval(obj.iTime); } else { var iSpeed=(target-obj.offsetTop)/4; iSpeed=iSpeed>0?Math.ceil(iSpeed):Math.floor(iSpeed); obj.style.top=obj.offsetTop+iSpeed+'px'; } }, 30); } </script> </head> <body> <div id="nav"> <ul> <li class="current"> <a href="#"> <strong> <span>首页</span> <span class="active">首页</span> </strong> </a> </li> <li> <a href="#"> <strong> <span>前端开发课程</span> <span class="active">前端开发课程</span> </strong> </a> </li> <li> <a href="#"> <strong> <span>妙味视频教程</span> <span class="active">妙味视频教程</span> </strong> </a> </li> <li> <a href="#"> <strong> <span>周末班上课安排</span> <span class="active">周末班上课安排</span> </strong> </a> </li> <li> <a href="#"> <strong> <span>结课标准</span> <span class="active">结课标准</span> </strong> </a> </li> <li> <a href="#"> <strong> <span>联系妙味</span> <span class="active">联系妙味</span> </strong> </a> </li> </ul> </div> </body> </html> |
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