分类: 电脑/网络 >> 程序设计 >> 其他编程语言
问题描述:
请问大虾：有的网站在网站主页左边的地方，有一个menu的图标，点击后会弹出菜单，里面有带连接的文字或图标，怎么做的？
解析:
象这样的一般都用的js，css
水平方向的PopMenu-弹出菜单（DIV+CSS+JS）
此POPMENU根据alistapart的articles改编，比DW中用显示、隐藏层的方法要简单。在IE6.0 IE5.X Firefox NS都能正确显示，只用到很少的JS代码，使用时只要把<ul></ul>部分插入需要的地方即可，不会因分辨率不同而发生错位的现象。
>>
CSS代码
li ul {
?display: none;
?left: -40px;
?position: absolute;
?top: 24px;
?width: 490px; /*opera需要这个宽度，
?可根据导航条的实际宽度作调整*/
}
li ul li{
?display: inline;
}
li ul li a{
?background: url(h_line.gif) no-repeat 0px 7px;
?color: #666666;
?font-weight: normal;
?padding: 6px;
?text-align: left;
}
li ul li a:hover{
?background: url(h_line.gif) no-repeat 0px 7px;
?color: #DC4E1B;
?text-decoration: underline;
}
li ul,li ul li{
?border: 0px;
}
li:hover ul, li.over ul,ul li:hover {
?display: block;
}
ul {
?list-style: none;
?margin: 0px;
?padding: 0px;
?font: normal 11px verdana;
}
ul li {
?border: solid 1px #CCCCCC;
?border-left: 0px;
?float: left;
?position: relative;
}
ul li a {
?background: #F5F5F5;
?color: #666666;
?display: block;
?font-weight: bold;
?padding: 5px 10px;
?text-align: center;
?text-decoration: none;
}
ul li a:hover {
?background: #DC4E1B;
?color: #FFFFFF;
}
.left{
?height: 24px;
?width: 1px;
}
:
<ul id="nav">
? <li class="left"></li><li><a href="#">Home</a></li>
<li><a href="#">About</a><ul> <li><a href="#">Sub menu 21</a>
</li><li><a href="#">Sub menu 22</a></li> <li><a href="#">
Sub menu 23</a></li><li><a href="#">Sub menu 24</a></li> </ul>
</li> <li><a href="#">Products</a><ul><li><a href="#">Sub menu 31
</a></li> <li><a href="#">Sub menu 32</a></li> <li><a href="#">
Sub menu 33</a></li> <li><a href="#">Sub menu 34</a></li></ul>
</li> <li><a href="#">Services</a><li><a href="#">Contact Us
</a></li>
</ul>
js代码
startList = function() {
if (document.all&&document.getElementById) {
navRoot = document.getElementById("nav");
for (i=0; i<navRoot.childNodes.length; i++) {
node = navRoot.childNodes[i];
if (node.nodeName=="LI") {
node.onmouseover=function() {
this.className+=" over";
}
node.onmouseout=function() {
this.className=this.className.replace(" over", "");
}
}
}
}
}
window.onload=startList;
--------------------------------------------------------------------------------
垂直方向：>>
css:
body {
?font-family: Arial, Helvetica, sans-serif;
?font-size: 11px;
}
#nav, #nav ul {
?list-style: none;
?background: #F9F9F9;
?font-weight: bold;
?padding: 0px;
?margin: 0px;
?border: solid 1px #CCCCCC;
?border-bottom: 0px;
?width: 150px;
?text-align: left;
}
#nav ul ul{
?border: solid 1px #CCCCCC;
?border-bottom: 0px;
}
#nav a {
?display: block;
?width: 150px;
?w\idth: 140px;
?color: #333333;
?text-decoration: none;
?text-align: center;
?border-bottom: solid 1px #CCCCCC;
?text-align: left;
?padding-left: 10px;
}
#nav a:hover{
?color: #336666;
}
#nav a.selected{
?background: url(../images/arrow.gif) no-repeat right 50%;
}
#nav li {
?line-height: 22px;
?position: relative;
}
#nav li ul {
?position: absolute;
?left: -999em;
?width: 150px;
?font-weight: normal;
?margin: 0px;
?padding: 0px;
}
#nav li li {
?width: 150px;
}
#nav li ul a {
?width: 150px;
?w\idth: 126px;
?padding: 0px 12px;
?line-height: 22px;
?text-align: left;
}
#nav li ul ul {
?margin: 0px 0 0 150px;
}
#nav li:hover ul ul,#nav li.sfhover ul ul{
?left: -999em;
}
#nav li:hover ul, #nav li li:hover ul,#nav li.sfhover ul, #nav li li.sfhover ul{
?left: auto;
}
#nav li:hover ul,#nav li.sfhover ul{
?left: 150px;
?top: 0px;
}
#nav li:hover, #nav li.sfhover {
?background: #F5E3C0;
}
* #nav li {
?float: left;
?height: 1%;
}
* #nav li a {
?height: 1%;?
}
js:
<script type=text/javascript><!----><![CDATA[><!--
sfHover = function() {
?var sfEls = document.getElementById("nav").getElementsByTagName("LI");
?for (var i=0; i<sfEls.length; i++) {
??sfEls[i].onmouseover=function() {
???this.className+=" sfhover";
?? }
??sfEls[i].onmouseout=function() {
???this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
?? }
? }
}
if (window.attachEvent) window.attachEvent("onload", sfHover);
--><!]]></script>
:
<ul id="nav">
<li><a href="">Home</a></li>
<li><a href="/aboutme">About Me</a></li>
<li><a class="selected" href="/tutorials">Tutorials</a>
?<ul>
?<li><a href="#">Sub Menu 31</a></li>
?<li><a class="selected" href="#">Sub Menu 32</a>
?<ul>
?<li><a href="#">Sub Menu 321</a></li>
?<li><a href="#">Sub Menu 322</a></li>
?<li><a href="#">Sub Menu 323</a></li>
?<li><a href="#">Sub Menu 324</a></li>
?</ul>
?</li>
?<li><a href="#">Sub Menu 33</a></li>
?<li><a href="#">Sub Menu 34</a></li>
?</ul>
</li>
<li><a class="selected" href="/gallery/gallery">Gallery</a>
<ul>
?<li><a href="#">Sub Menu 41</a></li>
?<li><a class="selected" href="#">Sub Menu 42</a>
?<ul>
?<li><a href="#">Sub Menu 421</a></li>
?<li><a href="#">Sub Menu 422</a></li>
?<li><a href="#">Sub Menu 423</a></li>
?<li><a href="#">Sub Menu 424</a></li>
?</ul>
?</li>
?<li><a href="#">Sub Menu 43</a></li>
?<li><a href="#">Sub Menu 44</a></li>
?</ul>
</li>
<li><a href="#">Contact Me</a></li>
</ul>