Dropdown Menu

<style type=”text/css”>

#nav {
 margin: 0;
 padding: 7px 6px 0;
 background: #000  repeat-x 0 -110px;
 line-height: 100%;

 border-radius: 2em;
 -webkit-border-radius: 2em;
 -moz-border-radius: 2em;

 -webkit-box-shadow: 0 1px 3px rgba(0,0,0, .4);
 -moz-box-shadow: 0 1px 3px rgba(0,0,0, .4);
}
#nav li {
 margin: 0 5px;
 padding: 0 0 8px;
 float: left;
 position: relative;
 list-style: none;
}


/* main level link */
#nav a {
 font-weight: bold;
 color: #e7e5e5;
 text-decoration: none;
 display: block;
 padding:  8px 20px;
 margin: 0;

 -webkit-border-radius: 1.6em;
 -moz-border-radius: 1.6em;
 
 text-shadow: 0 1px 1px rgba(0,0,0, .3);
}
#nav a:hover {
 background: #000;
 color: #fff;
}

/* main level link hover */
#nav .current a, #nav li:hover > a {
 background: #fff) repeat-x 0 -40px;
 color: #444;
 border-top: solid 1px #f8f8f8;

 -webkit-box-shadow: 0 1px 1px rgba(0,0,0, .2);
 -moz-box-shadow: 0 1px 1px rgba(0,0,0, .2);
 box-shadow: 0 1px 1px rgba(0,0,0, .2);

 text-shadow: 0 1px 0 rgba(255,255,255, 1);
}

/* sub levels link hover */
#nav ul li:hover a, #nav li:hover li a {
 background: none;
 border: none;
 color: #666;

 -webkit-box-shadow: none;
 -moz-box-shadow: none;
}
#nav ul a:hover {
 background: #0078ff  repeat-x 0 -100px !important;
 color: #fff !important;

 -webkit-border-radius: 0;
 -moz-border-radius: 0;

 text-shadow: 0 1px 1px rgba(0,0,0, .1);
}

/* dropdown */
#nav li:hover > ul {
 display: block;
}

/* level 2 list */
#nav ul {
 display: none;

 margin: 0;
 padding: 0;
 width: 185px;
 position: absolute;
 top: 35px;
 left: 0;
 background: #ddd url repeat-x 0 0;
 border: solid 1px #b4b4b4;

 -webkit-border-radius: 10px;
 -moz-border-radius: 10px;
 border-radius: 10px;

 -webkit-box-shadow: 0 1px 3px rgba(0,0,0, .3);
 -moz-box-shadow: 0 1px 3px rgba(0,0,0, .3);
 box-shadow: 0 1px 3px rgba(0,0,0, .3);
}
#nav ul li {
 float: none;
 margin: 0;
 padding: 0;
}

#nav ul a {
 font-weight: normal;
 text-shadow: 0 1px 0 #fff;
}

/* level 3+ list */
#nav ul ul {
 left: 181px;
 top: -3px;
}

/* rounded corners of first and last link */
#nav ul li:first-child > a {
 -webkit-border-top-left-radius: 9px;
 -moz-border-radius-topleft: 9px;

 -webkit-border-top-right-radius: 9px;
 -moz-border-radius-topright: 9px;
}
#nav ul li:last-child > a {
 -webkit-border-bottom-left-radius: 9px;
 -moz-border-radius-bottomleft: 9px;

 -webkit-border-bottom-right-radius: 9px;
 -moz-border-radius-bottomright: 9px;
}

/* clearfix */
#nav:after {
 content: ".";
 display: block;
 clear: both;
 visibility: hidden;
 line-height: 0;
 height: 0;
}
#nav {
 display: inline-block;
} 
html[xmlns] #nav {
 display: block;
}
 
* html #nav {
 height: 1%;
}
</style>

orjinali:
http://www.webdesignerwall.com/tutorials/css3-dropdown-menu/

Orjinal demo
http://www.webdesignerwall.com/demo/css3-dropdown-menu/