contextmenu事件：用以表示何时应该显示上下文菜单，以便开发人员取消默认的上下文菜单而提供自定义的菜单
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效果如下所示
HTML5+CSS3实现全屏导航栏菜单，悬停在右上角的小图标，点击以圆形扩散的方式绽开全屏导航栏，这种方式的导航栏很吸睛，运用也越来越广，赶紧学起来呀！
效果：
源码：
建议使用FF，Safari，举个例子：
!doctype html
html
head
titleHTML5+CSS3+JavaScript/title
meta http-equiv="Content-Type" content="text/html; charset=gb2312" /
meta http-equiv="Content-Type" content="text/html; charset=gbk" /
meta http-equiv="Content-Type" content="text/html; charset=utf-8" /
meta http-equiv="Content-Language" content="zh-cn" /
meta name="Generator" content="EditPlus"
meta name="Author" content=""
meta name="Keywords" content=""
style type="text/css"
body {
behavior: url(ie-css3.htc);
}
* {margin:0 auto;padding:0;}
body {font-size:13px;font-family:Arial;}
ul li {list-style:none;}
#menu {
width:982px;
height:35px;
margin-top:20px;display:block;
background: #e3e3e3;
background: -moz-linear-gradient(top, #ccc, #999);
background: -webkit-gradient(linear, left top, left bottom, from(#ccc), to(#999));
-moz-box-shadow: 1px 1px 3px #333;
-webkit-box-shadow: 1px 1px 3px #333;
box-shadow: 1px 1px 3px #333;
-webkit-border-top-left-radius:4px;;
-webkit-border-top-right-radius:4px;
-moz-border-radius-topleft:4px;
-moz-border-radius-topright:4px;
-webkit-border-bottom-left-radius:4px;
-webkit-border-bottom-right-radius:4px;
-moz-border-radius-bottomleft:4px;
-moz-border-radius-bottomright:4px;
-o-border-radius:4px;
-khtml-border-radius:4px;
text-shadow: 0 1px 0 white;
}
#menu ul {
margin-left:0;
}
#menu ul li {
display:inline;
}
#menu ul li a:link, a:visited {
text-align:center;float:left;width:6.8em;text-decoration:none;padding:7.5px 0.75em;font-size:16px;font-weight:bold;margin-top:0px;border-right:1px solid #ccc;color: #454545;
}
#menu ul li a:hover {
text-decoration:none;
background:-webkit-gradient(linear, left top, left bottom, from(#333), to(#ccc));
background: -moz-linear-gradient(top, #333, #ccc);
-webkit-background-size:0 35px;
color: #ddd;
text-shadow: 0 1px 0 black;
}
.text {
border:1px solid gray;width:150px;height:17px;position:relative;top:8px;left:13px;font-family:Arial;
-webkit-border-top-left-radius:90px;;
-webkit-border-top-right-radius:90px;
-moz-border-radius-topleft:90px;
-moz-border-radius-topright:90px;
-webkit-border-bottom-left-radius:90px;
-webkit-border-bottom-right-radius:90px;
-moz-border-radius-bottomleft:90px;
-moz-border-radius-bottomright:90px;
-o-border-radius:90px;
-khtml-border-radius:90px;
}
/style
script language="JavaScript" type="text/javascript"
(function()
{
if(!0)
return;
var e = "abbr,article,aside,audio,bb,canvas,datagrid,datalist,details,dialog, eventsource,figure,footer,hgroup,header,mark,menu,meter,nav,output,progress,section,time,video".split(','),i=0,length=e.length;
while(ilength)
{
document.createElement_x(e[i++])
}
})();
/script
/head
body
menu id="menu"form action="index.php" method="get"
ul
lia href="#" title="HomePage"HomePage/a/li
lia href="#" title="Introuduce"Introuduce/a/li
lia href="#" title="Products"Products/a/li
lia href="#" title="My album"My album/a/li
lia href="#" title="Shopping"Shopping/a/li
lia href="#" title="Contact our"Contact our/a/li
/ul
input type="search" class="text" value="search..." //form
/menu
body
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
1）、普通下拉列表菜单
html代码如下：
form action="" method="get"
label1、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"
label2、跳转的下拉列表菜单/label
select name="jumpMenu" id="jumpMenu"
onchange="MM_jumpMenu('parent',this,0)"
option value=""Rothur/option
option value=""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
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();
@import url();
* {margin: 0; padding: 0;}
li {list-style-type: none;}
.grid {float: left;width:980px;margin: 0 auto;}
.grid li { width: 285px; height: 500px; overflow: hidden; float: left; margin: 20px 0 20px 30px; position: relative; }
.grid li:hover {box-shadow: 0 0 15px 0 rgba(0, 0, 0, 0.5);}
.gridli section {position: relative; transition: all 0.25s; width: 100%;}
.gridli h2 {font: bold 14px montserrat; color: #fff; text-transform: uppercase; position: absolute; text-align: center; width: 60%; left: 20%; top: 100px; padding: 10px 0; border: 2px solid white; border-radius: 4px;}
.sidenav { position: absolute; top: 0; left: 0; bottom: 0; background: linear-gradient(rgba(50,60,60, 1), rgba(50,60,60, 0.7)); width: 50px; transition: all 0.25s; overflow: hidden; padding-top: 100px;}
.sidenav li { _overflow: hidden; width: 150px; }
.sidenav a { text-decoration: none; color: #eee; display: block; line-height: 48px; }
.sidenav span {display: block;}
.sidenav b { padding-left 10px; display: block; color: white; font-family: Montserrat; font-size: 12px; line-height: 4; opacity: 0; }
.sidenav a i { display: block; float: left; font-size: 16px; line-height: 48px; width: 50px; text-align: center; }
/*All instances*/
.gridli:hover .sidenav {width: 150px;}
.gridli:hover section {margin-left: 150px;}
.gridli: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 .4s; opacity: 1;}
.two .sidenav {width: 150px;}
/*One*/
.one .w {transform: perspective(100px);}
.one b {transform: perspective(100px) rotateY(90deg); _opacity: 0; transform-origin: left center; _border: 1px solid white;}
.one:hover b {transform: perspective(100px) rotateX(0); transition: all .4s; opacity: 1;}
.one .sidenav {width: 150px;}
.one .sidenav span {float: left; width: 100px;}
/style
!--[if IE]
script src=""/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:center;clear: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"
liai class="fa fa-check"/ispan class="w"bTasks/b/span/a/li
liai class="fa fa-inbox"/ispan class="w"bMessages/b/span/a/li
liai class="fa fa-pencil"/ispan class="w"bNew Post/b/span/a/li
liai class="fa fa-cog"/ispan class="w"bSettings/b/span/a/li
liai class="fa fa-star"/ispan class="w"bStarred/b/span/a/li
liai class="fa fa-power-off"/ispan class="w"bLogout/b/span/a/li
/ul
section
h2Door Opening/h2
img src="img/mb1.png"/
/section
/li
li class="two"
ul class="sidenav"
liai class="fa fa-check"/ispan class="w"bTasks/b/span/a/li
liai class="fa fa-inbox"/ispan class="w"bMessages/b/span/a/li
liai class="fa fa-pencil"/ispan class="w"bNew Post/b/span/a/li
liai class="fa fa-cog"/ispan class="w"bSettings/b/span/a/li
liai class="fa fa-star"/ispan class="w"bStarred/b/span/a/li
liai class="fa fa-power-off"/ispan class="w"bLogout/b/span/a/li
/ul
section
h2Flip Down/h2
img src="img/mb2.png"/
/section
/li
li class="three"
ul class="sidenav"
liai class="fa fa-check"/ispan class="w"bTasks/b/span/a/li
liai class="fa fa-inbox"/ispan class="w"bMessages/b/span/a/li
liai class="fa fa-pencil"/ispan class="w"bNew Post/b/span/a/li
liai class="fa fa-cog"/ispan class="w"bSettings/b/span/a/li
liai class="fa fa-star"/ispan class="w"bStarred/b/span/a/li
liai class="fa fa-power-off"/ispan class="w"bLogout/b/span/a/li
/ul
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