dx html5怎样写下拉菜单

1）、普通下拉列表菜单

html代码如下：

<form action="" method="get"> 

<label>1、普通下拉列表菜单</label> 

<select name=""> 

<option value="0">DIVCSS5</option> 

<option value="1">DIVCSS5</option> 

</select> 

</form> 

2）、跳转下拉列表菜单（如常见点击后跳转到选择网站）

常常一些网站做友情链接，与部门之间使用select下拉标签实现网址跳转。下面我们通过代码与案例接受select跳转菜单应用。

跳转菜单html代码如下：

<form action="" method="get"> 

<label>2、跳转的下拉列表菜单</label> 

<select name="jumpMenu" id="jumpMenu"

 onchange="MM_jumpMenu('parent',this,0)"> 

<option value="http://www.Rothur.com/">Rothur</option> 

<option value="http://www.Rothur.com/">Rothur</option> 

</select> 

</form> 

实现跳转还需要在head标签内加入Js脚本动作代码：

<script type="text/javascript"> <!-- function MM_jumpMenu(targ,selObj,restore){ //v3.0 eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'") if (restore) selObj.selectedIndex=0 } //--> </script>

这个可以通过绝对定位，配合left设置 或者translate去实现

left的方法：

比如让class为menu的元素宽为300px，高100%的，设置left为-300px；在这期间可以加一个过渡transition:left 0.3s ...；

然后让class为menu active的元素设置 left设置为0就可以了 ，在这期间可以加一个过渡transition:left 0.3s ...；

然后可以通过Jquery的toggleClass('active')来实现切换

translate

比如让class为menu的元素宽为300px，高100%的，设置left为-300px；在这期间可以加一个过渡transition:left 0.3s ...；

然后让class为menu active的元素设置 transform:translate3d(-300px,0,0) ，在这期间可以加一个过渡transition:left 0.3s ...；

然后可以通过Jquery的toggleClass('active')来实现切换

这个过程中 需要注意 body需要overflow：hidden(不然会有滚动条，可设置overflow-x即可)

left 和 translate 最好用translate ，translate3d可以开启GPU硬件加速，性能会更好，体验会更流畅

我github有类似小组件样式

github： IFmiss

希望能解决你的问题

一共有4种侧滑动画特效。这款CSS3菜单的特点是鼠标划过时即可以各种动画方式展开和隐藏菜单项，该动画方式由CSS3中的transition-delay属性来完成

<style type="text/css">

/*Fontawesome Iconfont*/

@import url(http://libs.useso.com/js/font-awesome/4.0.1/css/font-awesome.min.css)

@import url(http://fonts.useso.com/css?family=Montserrat)

* {margin: 0padding: 0}

li {list-style-type: none}

.grid {float: leftwidth:980pxmargin: 0 auto}

.grid >li { width: 285pxheight: 500pxoverflow: hiddenfloat: leftmargin: 20px 0 20px 30pxposition: relative}

.grid >li:hover {box-shadow: 0 0 15px 0 rgba(0, 0, 0, 0.5)}

.grid>li section {position: relativetransition: all 0.25swidth: 100%}

.grid>li h2 {font: bold 14px montserratcolor: #ffftext-transform: uppercaseposition: absolutetext-align: centerwidth: 60%left: 20%top: 100pxpadding: 10px 0border: 2px solid whiteborder-radius: 4px}

.sidenav { position: absolutetop: 0left: 0bottom: 0background: linear-gradient(rgba(50,60,60, 1), rgba(50,60,60, 0.7))width: 50pxtransition: all 0.25soverflow: hiddenpadding-top: 100px}

.sidenav li { _overflow: hiddenwidth: 150px}

.sidenav a { text-decoration: nonecolor: #eee display: blockline-height: 48px }

.sidenav span {display: block}

.sidenav b { padding-left 10pxdisplay: blockcolor: whitefont-family: Montserratfont-size: 12pxline-height: 4opacity: 0}

.sidenav a i { display: blockfloat: leftfont-size: 16pxline-height: 48pxwidth: 50pxtext-align: center}

/*All instances*/

.grid>li:hover .sidenav {width: 150px}

.grid>li:hover section {margin-left: 150px}

.grid>li:hover b {opacity: 1}

.sidenav li:nth-child(1) b, .sidenav li:nth-child(1) a {transition-delay: .08s}

.sidenav li:nth-child(2) b, .sidenav li:nth-child(2) a {transition-delay: .16s}

.sidenav li:nth-child(3) b, .sidenav li:nth-child(3) a {transition-delay: .24s}

.sidenav li:nth-child(4) b, .sidenav li:nth-child(4) a {transition-delay: .32s}

.sidenav li:nth-child(5) b, .sidenav li:nth-child(5) a {transition-delay: .40s}

.sidenav li:nth-child(6) b, .sidenav li:nth-child(6) a {transition-delay: .48s}

/*Three*/

.three .w {transform: perspective(100px) translateZ(-24px)}

.three b {transform: perspective(100px) rotateY(180deg) translateZ(24px) scale(0.5)}

.three:hover b {transform: perspective(100px) rotateY(0) translateZ(24px) scale(1)transition: all 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275)background: transparent}

.three .sidenav {width: 150px}

/*Two*/

.two .w {transform: perspective(100px) translateZ(-24px)}

.two b {transform: perspective(100px) rotateX(90deg) translateZ(24px) scale(1.5)opacity: 0}

.two:hover b {transform: perspective(100px) rotateX(0) translateZ(24px) scale(1)transition: all .4sopacity: 1}

.two .sidenav {width: 150px}

/*One*/

.one .w {transform: perspective(100px)}

.one b {transform: perspective(100px) rotateY(90deg)_opacity: 0transform-origin: left center_border: 1px solid white}

.one:hover b {transform: perspective(100px) rotateX(0)transition: all .4sopacity: 1}

.one .sidenav {width: 150px}

.one .sidenav span {float: leftwidth: 100px}

</style>

<!--[if IE]>

<script src="http://libs.useso.com/js/html5shiv/3.7/html5shiv.min.js"></script>

<![endif]-->

</head>

<body>

<div class="htmleaf-container">

<header class="htmleaf-header bgcolor-11">

<div class="htmleaf-demo center">

<a href="index.html">DEMO1</a>

<a href="index2.html" class="current">DEMO2</a>

<a href="index3.html">DEMO3</a>

<a href="index4.html">DEMO4</a>

</div>

<div style="text-align:centerclear:both">

<script src="/gg_bd_ad_720x90.js" type="text/javascript"></script>

<script src="/follow.js" type="text/javascript"></script>

</div>

</header>

<div class="htmleaf-content bgcolor-8">

<ul class="grid">

<li class="one">

<ul class="sidenav">

<li><a><i class="fa fa-check"></i><span class="w"><b>Tasks</b></span></a></li>

<li><a><i class="fa fa-inbox"></i><span class="w"><b>Messages</b></span></a></li>

<li><a><i class="fa fa-pencil"></i><span class="w"><b>New Post</b></span></a></li>

<li><a><i class="fa fa-cog"></i><span class="w"><b>Settings</b></span></a></li>

<li><a><i class="fa fa-star"></i><span class="w"><b>Starred</b></span></a></li>

<li><a><i class="fa fa-power-off"></i><span class="w"><b>Logout</b></span></a></li>

</ul>

<section>

<h2>Door Opening</h2>

<img src="img/mb1.png"/>

</section>

</li>

<li class="two">

<ul class="sidenav">

<li><a><i class="fa fa-check"></i><span class="w"><b>Tasks</b></span></a></li>

<li><a><i class="fa fa-inbox"></i><span class="w"><b>Messages</b></span></a></li>

<li><a><i class="fa fa-pencil"></i><span class="w"><b>New Post</b></span></a></li>

<li><a><i class="fa fa-cog"></i><span class="w"><b>Settings</b></span></a></li>

<li><a><i class="fa fa-star"></i><span class="w"><b>Starred</b></span></a></li>

<li><a><i class="fa fa-power-off"></i><span class="w"><b>Logout</b></span></a></li>

</ul>

<section>

<h2>Flip Down</h2>

<img src="img/mb2.png"/>

</section>

</li>

<li class="three">

<ul class="sidenav">

<li><a><i class="fa fa-check"></i><span class="w"><b>Tasks</b></span></a></li>

<li><a><i class="fa fa-inbox"></i><span class="w"><b>Messages</b></span></a></li>

<li><a><i class="fa fa-pencil"></i><span class="w"><b>New Post</b></span></a></li>

<li><a><i class="fa fa-cog"></i><span class="w"><b>Settings</b></span></a></li>

<li><a><i class="fa fa-star"></i><span class="w"><b>Starred</b></span></a></li>

<li><a><i class="fa fa-power-off"></i><span class="w"><b>Logout</b></span></a></li>

</ul>

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