JS+CSS简单树形菜单实现方法
编程学习 2021-07-04 21:03www.dzhlxh.cn编程入门
这篇文章主要介绍了JS+CSS简单树形菜单实现方法,涉及JavaScript结合css动态操作页面元素结点的相关技巧,具有一定参考借鉴价值,需要的朋友可以参考下
本文实例讲述了JS+CSS简单树形菜单实现方法。分享给大家供大家参考。具体如下：
这是一款不错的CSS树形菜单，树状列表，当然不全是CSS实现，部分功能还使用了JavaScript代码进行配合，删减了修饰用的菜单图片，大家用的时候自己图片加进去，IMG标签大部分都预留了出来，稍懂Html语法的朋友很容易就看懂的。
运行效果截图如下：
在线演示地址如下：
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>
<title>树状列表</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" />
<style>
*{margin:0px;padding:0px;}
A:link{color: #000000; TEXT-DECORATION: none;}
A:visited {COLOR: #000000; TEXT-DECORATION: none}
A:active {COLOR: #3333ff; TEXT-DECORATION: none}
A:hover {COLOR: #ff0000; TEXT-DECORATION: none}
.panel{ BACKGROUND: #DDE4EA; COLOR:#654125;}
ul {
list-style: none;
margin: 0;
padding: 0;
}
img{
border:0px;
width:16px;
height:16px;
}
#menu{
margin-top: 0px;
}
.U1 {
background: #FFFFFF;
border-bottom:1px #9D9D9D solid;
}
.L1 a:link, .L1 a:visited{
color: #476074;
background: url("");
font-size:9pt;
display: block;
text-decoration: none;
height: 24px;
}
.L1 a:link span, .L1 a:visited span{
background: url("") no-repeat left;
padding-left: 15px;
height:24px;
vertical-align:middle;
padding:7px 0px 0px 16px;
cursor:pointer;
width:100%;
}
.L1 a:hover{
color: #000000;
font-weight:bold;
background: url("");
background-position: 0 -24px;
}
/* 一级菜单 active 效果 */
.L1 a:link.active, .L1 a:hover.active, .L1 a:active.active, .L1 a:visited.active{
background: url("");
background-position: 0 -24px;
}
.L1 a:link.active span, .L1 a:hover.active span, .L1 a:active.active span, .L1 a:visited.active span{
color: #000000;
font-weight:bold;
background: url("") no-repeat left;
}
.L21 a:link, .L21 a:visited, .L22 a:link, .L22 a:visited, .L3 a:link, .L3 a:visited{
color: #444659;
background: none;
height: 24px;
font-size:9pt;
display: block;
text-decoration: none;
padding-left: 13px;
background: none;
}
.L21 a:link span, .L21 a:visited span, .L22 a:link span, .L22 a:visited span, .L3 a:link span, .L3 a:visited span{
vertical-align:middle;
padding:7px 0px 0px 16px;
background: url("") no-repeat left center;
cursor:pointer;
width:100%;
}
.L22 a:link span, .L22 a:visited span, .L3 a:link span, .L3 a:visited span{
background:none;
}
.L21 a:hover, .L22 a:hover, .L3 a:hover{
background: url("") no-repeat top left;
font-weight:bold;
}
.L3 a:link span, .L3 a:visited span{
padding:7px 0px 0px 26px;
}
.L4 a:link span, .L4 a:visited span{
padding:7px 0px 0px 36px;
}
/* 二级菜单 active 效果 */
.L21 a:link.active, .L21 a:hover.active, .L21 a:active.active, .L21 a:visited.active{
background: none;
}
.L21 a:link.active span, .L21 a:hover.active span, .L21 a:active.active span, .L21 a:visited.active span{
color: #000000;
font-weight:bold;
background: url("") no-repeat left center;
}
/* 二、三级菜单 active */
.L22 a:link.active, .L22 a:hover.active, .L22 a:active.active, .L22 a:visited.active,
.L3 a:link.active, .L3 a:hover.active, .L3 a:active.active, .L3 a:visited.active{
background: url("") no-repeat left;
background-position: 0 -24px;
}
.L22 a:link.active span, .L22 a:hover.active span, .L22 a:active.active span, .L22 a:visited.active span,
.L3 a:link.active span, .L3 a:hover.active span, .L3 a:active.active span, .L3 a:visited.active span{
color: #FFFFFF;
font-weight:bold;
background: none;
}
.Ls{
text-align:right;
padding-top:4px;
height:20px;
font-size:9pt;
}
.setting:link, .setting:visited{
text-decoration: underline;
display:block;
}
</style>
</head>
<body class="panel" onLoad="init();">
<div id="sub_tabs" class="sub_tabs"></div>
<div id="body">
<!-- OA树开始-->
<ul id="menu">
<!--路政报表菜单 -->
<li class="L1"><a href="javascript:c('m01');" id="m01"><span><img src="" align="absMiddle"/> 路政报表</span></a></li>
<ul id="m01d" style="display:none;" class="U1">
<li class="L21"><a href="javascript:c('f40');" id="f40"><span><img src="" align="absMiddle"/> 路政报表1</span></a></li>
<ul id="f40d" style="display:none;">
<li class="L3"><a href="javascript:c('f42');"><span><img src= align="absMiddle"/> 报表内容</span></a></li>
<ul id="f42d" style="display:none;"><li class="L4" ><a href="#"><span><img src= align="absMiddle"/>子报表内容</span></a></li></ul>
<li class="L3"><a href="#"><span><img src="" align="absMiddle"/> 报表内容</span></a></li>
</ul>
<li class="L21"><a href="javascript:c('f41');" id="f41"><span><img src="" align="absMiddle"/> 路政报表2</span></a></li>
<ul id="f41d" style="display:none;">
<li class="L3"><a href="#"><span><img src="" align="absMiddle"/>报表内容</span></a></li>
<li class="L3"><a href="#"><span><img src="" align="absMiddle"/>报表内容</span></a></li>
</ul>
<li class="L22"><a href="#"><span><img src="" /> 报表内容</span></a></li>
<li class="L22"><a href="#"><span><img src="" /> 报表内容</span></a></li>
<li class="L22"><a href="#"><span><img src="" /> 报表内容</span></a></li>
</ul>
<!--路政报表菜单 结束 -->
<!--路政报表菜单 -->
<li class="L1"><a href="javascript:c('m03');" id="m03"><span><img src="" align="absMiddle"/> 路政报表</span></a></li>
<ul id="m03d" style="display:none;" class="U1">
<li class="L21"><a href="javascript:c('f42');" id="f42"><span><img src= align="absMiddle"/> 路政报表1</span></a></li>
<ul id="f42d" style="display:none;">
<li class="L3"><a href="#"><span><img src="" align="absMiddle"/> 报表内容</span></a></li>
<li class="L3"><a href="#"><span><img src="" align="absMiddle"/> 报表内容</span></a></li>
</ul>
<li class="L21"><a href="javascript:c('f43');" id="f43"><span><img src= align="absMiddle"/> 路政报表2</span></a></li>
<ul id="f43d" style="display:none;">
<li class="L3"><a href="#"><span><img src= align="absMiddle"/>报表内容</span></a></li>
<li class="L3"><a href="#"><span><img src= align="absMiddle"/>报表内容</span></a></li>
</ul>
<li class="L22"><a href="#"><span><img src="" /> 报表内容</span></a></li>
<li class="L22"><a href="#"><span><img src="" /> 报表内容</span></a></li>
<li class="L22"><a href="#"><span><img src="" /> 报表内容</span></a></li>
<li class="L22"><a href="#"><span><img src="" /> 报表内容</span></a></li>
<li class="L22"><a href="#"><span><img src="" /> 报表内容</span></a></li>
</ul>
<!--路政报表菜单 结束 -->
</ul>
</ul>
</div>
<script language="JavaScript">
window.onresize=function()
{
if(!parent.$('frame1')) return;
var rows = parent.$('frame1').rows.split(",");
if(rows.length < 2 || rows[1]!="*") return;
$("bottom_center").style.width = "0px";
if(document.body.clientHeight > $("sub_tabs").clientHeight+$("bottom").clientHeight)
$("body").style.height=(document.body.clientHeight-$("sub_tabs").clientHeight-$("bottom").clientHeight)+"px";
var widthTotal = parseInt($("bottom").clientWidth);
var widthLeft = parseInt($("bottom_left").clientWidth);
var widthRight = parseInt($("bottom_right").clientWidth);
if(!isNaN(widthTotal) && !isNaN(widthLeft) && !isNaN(widthRight))
{
$("bottom_center").style.width = widthTotal - widthLeft - widthRight + "px";
}
};
function init()
{
window.onresize();
}
var sub_menu="1";
function view_menu(id)
{
set_current("");
if($("menu").innerHTML.toLowerCase().indexOf("<li") >= 0)
$("menu_code_"+sub_menu).innerText=$("menu").innerHTML;
if($("menu_code_"+id).innerText=="" || isUndefined($("menu_code_"+id).innerText))
{
$("menu").innerHTML="<img src='/images/loading.gif' align='absMiddle'> 加载中，请稍候……";
if(id==2) args="MENU_TYPE=SHORTCUT&OA_SUB_WINDOW=0&MENU_DISPLAY=";
else if(id==3) args="MENU_TYPE=OA&OA_SUB_WINDOW=0";
else if(id==4) args="MENU_TYPE=FAV&OA_SUB_WINDOW=0";
else if(id==5) args="MENU_TYPE=FIS&OA_SUB_WINDOW=0";
else args="OA_SUB_WINDOW=0";
_get("menu_code.php", args, update_menu, true);
}
else
{
$("menu").innerHTML=$("menu_code_"+id).innerText;
}
if($('link_'+sub_menu))
$('link_'+sub_menu).className="";
$('link_'+id).className="active";
sub_menu=id;
setCookie("MENU_UI_1", id);
if(id == 5)
{
openURL("https://www.jb51.net/");
}
}
function update_menu(req)
{
if(req.status == 200)
{
if(req.responseText=="")
$("menu").innerHTML="<div style='padding:10px;'>无可访问菜单</div>";
else
{
$("menu").innerHTML=req.responseText;
if(sub_menu == 2) c('mMENU_SHORTCUT');
}
}
else
{
$("menu").innerHTML="<div style='padding:10px;'>错误："+req.status+"</div>";
}
}
var cur_id="",cur_expand="";
var flag=0,sflag=0;
//-------- 菜单点击事件 -------
function c(id)
{
var targetid,targetelement;
var strbuf;
var el=$(id);
if(!el)
return;
//-------- 如果点击了展开或收缩按钮---------
targetid=el.id+"d";
targetelement=$(targetid);
var expandUL=$(cur_expand+"d");
var expandLink=$(cur_expand);
if (targetelement.style.display=="none")
{
if(expandUL && expandLink && el.id.substr(0,1)=="m")
{
expandLink.className="";
expandUL.style.display='none';
}
if(el.id.substr(0,1)=="m")
cur_expand=el.id;
el.className="active";
targetelement.style.display='';
menu_flag=0;
//$("expand_link").src="images/green_minus.gif";
}
else
{
el.className="";
targetelement.style.display="none";
menu_flag=1;
//$("expand_link").src="images/green_plus.gif";
var links=document.getElementsByTagName("A");
for (i=0; i<links.length; i++)
{
el=links[i];
if(el.parentNode.className.toUpperCase()=="L1" && el.className=="active" && el.id.substr(0,1)=="m")
{
menu_flag=0;
// $("expand_link").src="images/green_minus.gif";
break;
}
}
}
}
//-------- 打开网址 -------
var $ = function(id) {return document.getElementById(id);};
var userAgent = navigator.userAgent.toLowerCase();
var is_opera = userAgent.indexOf('opera') != -1 && opera.version();
var is_ie = (userAgent.indexOf('msie') != -1 && !is_opera) && userAgent.substr(userAgent.indexOf('msie') + 5, 3);
function MouseOverBtn(){event.srcElement.className+="Hover";}
function MouseOutBtn() {event.srcElement.className=event.srcElement.className.substr(0,event.srcElement.className.indexOf("Hover"));}
function CorrectButton()
{
var inputs=document.getElementsByTagName("INPUT");
for(var i=0; i<inputs.length; i++)
{
var el = inputs[i];
var elType = el.type.toLowerCase();
var elClass = el.className.toLowerCase();
var elLength = Math.ceil(el.value.replace(/[^\x00-\xff]/g,"**").length/2);
if(elType!="button" && elType!="submit" && elType!="reset" || elClass!="bigbutton"&&elClass!="smallbutton")
continue;
if(elLength<=3)
el.className+="A";
else if(elLength==4)
el.className+="B";
else if(elLength>=5 && elLength<=7)
el.className+="C";
else if(elLength>=8 && elLength<=11)
el.className+="D";
else
el.className+="E";
if(is_ie)
{
el.attachEvent("onmouseover", MouseOverBtn);
el.attachEvent("onmouseout", MouseOutBtn);
}
}
}
if(is_ie)
window.attachEvent("onload", CorrectButton);
else
window.addEventListener("load", CorrectButton,false);
</script>
</body>
</html>
希望本文所述对大家的JavaScript程序设计有所帮助。