以下是 jQuery ReSmenu下拉菜单特效代码 的示例演示效果:
部分效果截图:

HTML代码(index.html):
<!DOCTYPE html>
<html>
<head>
    <meta charset="gb2312" />
    <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
    <title>jQuery ReSmenu下拉菜单</title>
    <link rel="stylesheet" type="text/css" media="all" href="css/style.css" />
    <script src="http://code.jquery.com/jquery-latest.js"></script>
    <script src="js/jquery.resmenu.js"></script>
    <script>
        $(window).ready(function () {
            $('#menu1').ReSmenu();
            $('#menu2').ReSmenu({ maxWidth: 720 });
            $('#menu3').ReSmenu({ textBefore: 'Choose:' });
            $('#menu4').ReSmenu({ selectOption: 'Choose:' });
        });
    </script>
</head>
<body>
    <div class="container">
        <h1>jQuery ReSmenu <span>v0.1.0</span></h1>
        <h2>Some examples</h2>
        <!-- Menu 1 -->
        <span class="title">Example A - No options</span>
        <div class="menu_container">
            <ul class="toresponsive" id="menu1">
                <li><a href="/">Home</a></li>
                <li class="current-menu-item"><a href="http://13141618.taobao.com/">Link</a></li>
                <li>
                    <a href="">Submenu no url</a>
                    <ul>
                        <li>
                            <a href="#">Submenu with #</a>
                            <ul>
                                <li><a href="http://13141618.taobao.com/">Link</a></li>
                            </ul>
                        </li>
                        <li><a href="http://13141618.taobao.com/">Link</a></li>
                    </ul>
                </li>
                <li>
                    <a href="http://13141618.taobao.com/">Submenu with url</a>
                    <ul>
                        <li><a href="http://13141618.taobao.com/">Link</a></li>
                        <li>
                            <a>Submenu no href</a>
                            <ul>
                                <li><a href="http://13141618.taobao.com/">Link</a></li>
                                <li><a href="http://13141618.taobao.com/">Link</a></li>
                                <li><a href="">Link no url</a></li>
                            </ul>
                        </li>
                    </ul>
                </li>
            </ul>
        </div>
        <pre>$('#menu1').ReSmenu();</pre>
        <!-- Menu 2 -->
        <span class="title">Example B - Collapse at 720px wide</span>
        <div class="menu_container">
            <ul class="toresponsive" id="menu2">
                <li><a href="/">Home</a></li>
                <li class="current-menu-item"><a href="http://13141618.taobao.com/">Link</a></li>
                <li>
                    <a href="">Submenu no url</a>
                    <ul>
                        <li>
                            <a href="#">Submenu with #</a>
                            <ul>
                                <li><a href="http://13141618.taobao.com/">Link</a></li>
                            </ul>
                        </li>
                        <li><a href="http://13141618.taobao.com/">Link</a></li>
                    </ul>
                </li>
                <li>
                    <a href="http://13141618.taobao.com/">Submenu with url</a>
                    <ul>
                        <li><a href="http://13141618.taobao.com/">Link</a></li>
                        <li>
                            <a>Submenu no href</a>
                            <ul>
                                <li><a href="http://13141618.taobao.com/">Link</a></li>
                                <li><a href="http://13141618.taobao.com/">Link</a></li>
                                <li><a href="">Link no url</a></li>
                            </ul>
                        </li>
                    </ul>
                </li>
            </ul>
        </div>
        <pre>$('#menu2').ReSmenu({
    maxWidth: 720
});</pre>
        <!-- Menu 3 -->
        <span class="title">Example C - Menu with label</span>
        <div class="menu_container nofull">
            <ul class="toresponsive" id="menu3">
                <li><a href="/">Home</a></li>
                <li class="current-menu-item"><a href="http://13141618.taobao.com/">Link</a></li>
                <li>
                    <a href="">Submenu no url</a>
                    <ul>
                        <li>
                            <a href="#">Submenu with #</a>
                            <ul>
                                <li><a href="http://13141618.taobao.com/">Link</a></li>
                            </ul>
                        </li>
                        <li><a href="http://13141618.taobao.com/">Link</a></li>
                    </ul>
                </li>
                <li>
                    <a href="http://13141618.taobao.com/">Submenu with url</a>
                    <ul>
                        <li><a href="http://13141618.taobao.com/">Link</a></li>
                        <li>
                            <a>Submenu no href</a>
                            <ul>
                                <li><a href="http://13141618.taobao.com/">Link</a></li>
                                <li><a href="http://13141618.taobao.com/">Link</a></li>
                                <li><a href="">Link no url</a></li>
                            </ul>
                        </li>
                    </ul>
                </li>
            </ul>
        </div>
        <pre>$('#menu3').ReSmenu({
    textBefore: 'Choose:'
});</pre>
        <!-- Menu 4 -->
        <span class="title">Example D - Menu with first option</span>
        <p class="note">The active li won't be highlighted</p>
        <div class="menu_container">
            <ul class="toresponsive" id="menu4">
                <li><a href="/">Home</a></li>
                <li class="current-menu-item"><a href="http://13141618.taobao.com/">Link</a></li>
                <li>
                    <a href="">Submenu no url</a>
                    <ul>
                        <li>
                            <a href="#">Submenu with #</a>
                            <ul>
                                <li><a href="http://13141618.taobao.com/">Link</a></li>
                            </ul>
                        </li>
                        <li><a href="http://13141618.taobao.com/">Link</a></li>
                    </ul>
                </li>
                <li>
                    <a href="http://13141618.taobao.com/">Submenu with url</a>
                    <ul>
                        <li><a href="http://13141618.taobao.com/">Link</a></li>
                        <li>
                            <a>Submenu no href</a>
                            <ul>
                                <li><a href="http://13141618.taobao.com/">Link</a></li>
                                <li><a href="http://13141618.taobao.com/">Link</a></li>
                                <li><a href="">Link no url</a></li>
                            </ul>
                        </li>
                    </ul>
                </li>
            </ul>
        </div>
        <pre>$('#menu4').ReSmenu({
    selectOption: 'Choose:'
});</pre>
        <h2>Some css</h2>
        <p><strong>ReSmenu</strong> runs out of the box but if you want to style your select to better fit the container you can take advantage of the short css style taken from twitter bootstrap:</p>
        <pre>.responsive_menu select {
    display: block;
    width: 100%;
    height: 36px;
    padding: 6px 12px;
    font-size: 14px;
    line-height: 1.42857;
    color: rgb(85, 85, 85);
    vertical-align: middle;
    background-color: rgb(255, 255, 255);
    background-image: none;
    border: none;
}</pre>
    </div>
</body>
</html>
JS代码(jquery.resmenu.min.js):
/*! ReSmenu v0.1 by Alessandro Benoit */
(function(e,t,n){
	e.fn.ReSmenu=function(r){
	function o(t,n,r){
	r=typeof r!=="undefined"?r:"";
	e(t).children("li").each(function(){
	var t=e(this).children("a").attr("href");
	if(typeof t==="undefined"||t===false||t=="#"||t.length==0){
	t=""}
e("<option/>",{
	value:t,html:r+e(this).children("a").text(),disabled:!t?true:false,selected:e(this).hasClass(s.activeClass)&&!s.selectOption?true:false}
).appendTo(n);
	if(e(this).children("ul").length>0){
	o(e(this).children("ul"),n,r+" 
	 
	")}
}
)}
function u(n,r){
	var i=e("<div/>",{
	"class":s.menuClass}
).appendTo(e(n).parent());
	var u=e("<select/>",{
	id:s.selectId+r}
).appendTo(i);
	e(u).bind("change",function(){
	if(e(this).val().length>0){
	t.location.href=e(this).val()}
}
);
	if(s.textBefore){
	e("<label/>",{
	html:s.textBefore,"for":s.selectId+r}
).prependTo(i)}
if(s.selectOption){
	e("<option/>",{
	text:s.selectOption,value:""}
).appendTo(u)}
o(e(n),u);
	return i}
var s=e.extend({
	menuClass:"responsive_menu",selectId:"resmenu",textBefore:false,selectOption:false,activeClass:"current-menu-item",maxWidth:480}
,r);
	this.each(function(){
	function a(){
	if(e(t).width()>parseInt(s.maxWidth)){
	e(r).show();
	if(o){
	e(o).hide()}
}
else{
	e(r).hide();
	if(o){
	e(o).show()}
else{
	o=u(r,n)}
}
}
var r=e(this),o;
	n++;
	a();
	e(t).resize(function(){
	a()}
)}
)}
}
)(jQuery,this,0)CSS代码(style.css):
a{text-decoration:none;color:#4988C6;}
p{color:#444;}
h1 span{color:#ddd;font-size:26px;}
body{font-family:"Helvetica Neue";}
.container{margin:0 auto;width:90%;padding:0 5% 20px 5%;max-width:960px;}
.menu_container{display:block;padding:0 10px;margin:10px 0;background:#fff;border:1px solid #eee;height:36px;-moz-box-shadow:0 2px 2px rgba(0,0,0,0.075);-webkit-box-shadow:0 2px 2px rgba(0,0,0,0.075);box-shadow:0 2px 2px rgba(0,0,0,0.075);}
.menu_container a{text-decoration:none;color:#333;font-weight:800;font-size:12px;display:block;height:36px;line-height:36px;padding:0 15px;}
.menu_container ul{margin:0;padding:0;list-style:none;}
.menu_container ul li.current-menu-item{background-color:#ddd;}
.menu_container > ul > li{display:block;float:left;position:relative;}
.menu_container ul li:hover{background:#f6f6f6;}
.menu_container > ul > li > ul{background-color:#fff;position:absolute;display:none;border:1px solid #eee;top:100%;width:140px;}
.menu_container > ul > li:hover > ul{display:block;}
.menu_container > ul > li > ul > li{position:relative;}
.menu_container > ul > li > ul > li > ul{display:none;position:absolute;left:100%;top:0;border:1px solid #eee;width:140px;}
.menu_container > ul > li > ul > li:hover > ul{display:block;background-color:#fff;}
.menu_container > ul > li > ul > li > ul > li{}
.content{clear:both;}
.title{font-weight:800;font-size:12px;text-transform:uppercase;}
pre{background-color:#fafafa;padding:20px;overflow:auto;border:1px solid #f1f1f1;color:#000;}
.responsive_menu select{display:block;width:100%;height:36px;padding:6px 12px;font-size:14px;line-height:1.42857;color:rgb(85,85,85);vertical-align:middle;background-color:rgb(255,255,255);background-image:none;border:none;}
.nofull select{width:auto;}
label{float:left;line-height:36px;font-weight:800;font-size:12px;}
.note{color:#999;font-size:14px;}
.download_button{padding:15px 0;background:#F2F2F2;display:block;margin:30px auto;width:100%;max-width:200px;text-align:center;color:#4988C6;text-decoration:none;font-weight:800;font-size:12px;border-bottom:3px solid #ddd;}
.download_button:active{position:relative;top:3px;border-bottom:0;}
.download_button:hover{background-color:#eaeaea;}
 
             
        