楼上的这位大哥为什么还要上面这样写函数啊 ? 我下面的这样写不是一样吗? function showNav(num){ var tags=document.getElementById("Menu").getElementsByTagName("dd"); for (i=0; i<tags.length; i++){ if (i==num){ if (tags[i].className!="on"){ tags[i].className="on"; } else{ tags[i].className=""; } }else{ tags[i].className=""; } } }
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<script language="javascript" type="text/javascript">
function $(id){return document.getElementById(id)}
function showNav(num){var tags=$("Menu").getElementsByTagName("dd");for (i=0; i<tags.length; i++){if (i==num){if (tags[i].className!="on"){tags[i].className="on";}else{tags[i].className=""; }}else{tags[i].className="";}}}
</script>
<style>
#Menu{
display:block;
list-style-type:none;
margin:0px;
padding:0px;
overflow:hidden;
width:151px;
}
#Menu dt{
display:block;
overflow:hidden;
margin:0px;
padding:0px;
text-align:center;
line-height:28px;
height:28px;
font-size:12px;
color:#95D6E4;
background:#333333;
}
#Menu dd{
margin:0px 0px 1px 0px;
padding:0px;
width:151px;
text-align:center;
line-height:21px;
background:#95D6E4;
display:block;
}
#Menu dd a{
margin:0px;
padding:0px;
display:block;
color:#FFFFFF;
text-decoration:none;
}
#Menu dd ul{
display:none;
background:#FFFFFF;
}
#Menu dd.on ul{
display:block;
overflow:hidden;
margin:0px;
padding:2px 0px;
border:1px solid #95D6E4;
text-align:left;
width:149px;
}
#Menu dd.on ul li{
background:#EFEFEF;
margin:2px 5px;
padding:0px;
display:block;
overflow:hidden;
height:20px;
}
#Menu dd.on ul li a{
display:block;
color:#033D61;
padding:4px 3px;
line-height:12px;
height:12px;
}
#Menu dd.on ul li a:hover{
padding:3px 2px;
border:1px solid #95D6E4;
}
</style>
</head><body>
<dl id="Menu">
<dt>管理菜单</dt>
<dd class="on">
<a href="javascript:void(0)" onClick="showNav(0);">一级菜单一</a>
<ul>
<li><a href="#">子菜单一1</a></li>
<li><a href="#">子菜单一2</a></li>
<li><a href="#">子菜单一3</a></li>
<li><a href="#">子菜单一4</a></li>
</ul>
</dd>
<dd>
<a href="javascript:void(0)" onClick="showNav(1);">一级菜单一</a>
<ul>
<li><a href="#">子菜单二1</a></li>
<li><a href="#">子菜单二2</a></li>
<li><a href="#">子菜单二3</a></li>
<li><a href="#">子菜单二4</a></li>
</ul>
</dd>
</dl>
</body>
</html>
我下面的这样写不是一样吗?
function showNav(num){
var tags=document.getElementById("Menu").getElementsByTagName("dd");
for (i=0; i<tags.length; i++){
if (i==num){
if (tags[i].className!="on"){
tags[i].className="on";
}
else{
tags[i].className="";
}
}else{
tags[i].className="";
}
}
}