/* == 10. Horizontal menu Background == */

/*====================
 Color Scheme Begin
=====================================================================
====================================================================*/

/* Menu bar background color */
#navigation, 
#nav li ul li, 
#nav li ul li a{
background: #000; 
}

/* Menu Item text color */
#nav li a, 
#nav li a:hover, 
#nav li ul li,
#nav li ul li a,
#nav li ul li a:hover  {
color: #fff; 
}

/* Menu Item background color on hover */
#nav li a:hover, 
#nav li ul li a:hover  {
background: #9ACD32; 
}

/* Text Shadow */
#nav li a, 
#nav li a:hover, 
#nav li ul li a:hover  {
text-shadow: 0 1px 1px #333; 
}

/* Search form colors */
.searchform input, .searchform input:not(:focus){
color:#B1B1B1; /*search form text color default*/
background: #fff; /*search form background color default*/
}
.searchfield:focus{
color: #000; /* search form text color after click */
}

/*=====================================================================
=======================================================================
 Color Scheme End
====================*/

#menu_div{
clear: both;
position: relative;
top: 0;
left: 0;
} /* Free space to top specialy for menu */

#navigation {
position: fixed;
}

#navigation, #menu_div {
width: 100%;
margin: 0 !important;
padding: 0 !important;
}

#menu_div, #navigation, #menu, #nav{
height: 45px; /* menu height */
}

#menu_div:hover,
#navigation:hover,
#nav li a:hover, #nav li ul a 
{
opacity: 0.95;/* Menu transparency on mouse hover*/
} 

#menu_div,
#navigation, 
#nav li a, 
#menu_div:not(:hover), 
#navigation:not(:hover)
{
opacity: 0.8;/* Menu transparency on mouse out */
}


#menu {
width: 960px;
margin:0 auto; /*center the menu*/
padding:0;
position: relative;
}

#nav{
width: 960px;
margin:0;
padding:0;
position: relative;
font-family: 'Arial', Helvetica, sans-serif;
}

#nav li a,#nav li {
float:left;
}

#nav li {
list-style:none;
position:relative;
}

#nav li a {
line-height: 45px;
padding:0 15px;
text-decoration:none;
margin:0;
font-size:12px;
font-weight:700;
text-transform:uppercase;
}

/*====================
 Submenu 
=====================*/
#nav li ul {
display:none;
position:absolute;
left:0;
top:100%;
padding:0;
margin:0;
} /* hide submenu */

#nav li:hover > ul {
display:block;
} /* show submenu on hover */

#nav li ul li,#nav li ul li a {
float:none;
height: 35px; /* submenu item height */
min-width: 150px; /* submenu item minimal width */
line-height: 35px;
border-right: 0;
text-shadow: none;
display:block;
font-size:13px;
font-weight:400;
text-transform:inherit;
} /* Submenu item */

#nav li ul li {
_display:inline; /* for IE */
}

/* == 12. Sub-Sub Menu == */
#nav li ul li ul {
display:none;
}

#nav li ul li:hover ul {
left:100%;
top:0;
}

/*====================
 Search form 
====================*/

.searchform {
position: absolute;
right: 15px;
top: 6px;
display: inline-block;
zoom: 1;
*display: inline;
border: 0;
padding: 0;
}
.searchform input {
font: normal 12px/100% Arial, Helvetica, sans-serif;
}
.searchform .searchfield {
height: 27px;
line-height: 27px;
padding-left: 10px;
padding-right: 10px;
width: 150px;
border: 2px solid #333;
outline: none;
-webkit-border-radius: 2em;
-moz-border-radius: 2em;
border-radius: 2em;
-moz-box-shadow: inset 1px 1px 2px #A1A1A1;
-webkit-box-shadow: inset 1px 1px 2px #A1A1A1;
box-shadow: inner 1px 1px 2px #A1A1A1;
}

.searchfield:focus{
font-weight: 700;
width: 220px;
}

.searchfield:not(:focus){
width: 150px;
}


/*========================
  Transitions
========================*/

#nav li a:hover,
#nav li ul li a:hover  {
-webkit-transition-property:color, background; 
-webkit-transition-duration: 0.5s, 0.5s; 
-webkit-transition-timing-function: linear, ease-out;
}

.searchfield:focus,
.searchfield:not(:focus){
-webkit-transition-property:width; 
-webkit-transition-duration: 0.5s, 0.5s; 
-webkit-transition-timing-function: linear, ease-out;
}

#menu_div:hover,
#navigation:hover,
#nav li ul a, 
#menu_div,
#navigation, 
#nav li a, 
#menu_div:not(:hover), 
#navigation:not(:hover)
{
-webkit-transition-property:opacity; 
-webkit-transition-duration: 0.5s, 0.5s; /* duration in seconds */
-webkit-transition-timing-function: linear, ease-out;
} /* Menu transparency animation */

<div id="menu_div">
<div id="navigation">
 <div id="menu">
  <ul id="nav">
   <li><a href="#">Home</a>
    <ul>
     <li><a href="#">Lorem ipsum</a></li>
     <li><a href="#">Aenean massa</a></li>
     <li><a href="#">Nullam dictum felis</a></li>
     <li><a href="#">Aenean leo ligula</a></li>
     <li><a href="#">Curabitur ullamcorper</a></li>
     <li><a href="#">Item - Level 2</a>
      <ul>
       <li><a href="#">Sub item 1</a></li>
       <li><a href="#">Sub item 2</a></li>
       <li><a href="#">Item - Level 3</a>
        <ul>
         <li><a href="#">Sub sub item 1</a></li>
         <li><a href="#">Sub sub item 2</a></li>
         <li><a href="#">Item - Level 4</a>
          <ul>
           <li><a href="#">Sub sub sub item 1</a></li>
           <li><a href="#">Sub sub sub item 2</a></li>
           <li><a href="#">Sub sub sub item 3</a></li>
          </ul>
         </li> <!-- Level 4 END -->
        </ul>
       </li> <!-- Level 3 END -->
      </ul>
     </li> <!-- Level 2 END -->
    </ul>
   </li> <!-- Level 1 END -->
   <!-- END Home Item -->

   <li><a href="#">Portfolio</a>
    <ul>
     <li><a href="#">Maecenas tempus</a></li>
     <li><a href="#">Vestibulum ante ipsum</a></li>
     <li><a href="#">Praesent adipiscing</a></li>
     <li><a href="#">Curabitur ligula</a></li>
     <li><a href="#">Vestibulum</a>>
     </li>
    </ul>
   </li>
   <!-- END Portfolio Item -->

   <li><a href="#">Blog</a>
    <ul>
     <li><a href="#">Fusce id purus</a></li>
     <li><a href="#">Aenean viverra</a></li>
     <li><a href="#">Phasellus magna</a></li>
     <li><a href="#">Morbi ac felis</a></li>
    </ul>
   </li>
   <!-- END Blog Item -->

   <li><a href="#">Services</a></li>
   <li><a href="#">About Us</a></li>
   <li><a href="#">Contact Us</a></li>
  </ul><!-- #nav END-->

  <!-- Search Form -->
  <form class="searchform" action="#">
   <input class="searchfield" type="text" value="Search..." onfocus="if (this.value == 'Search...') {this.value = '';}" onblur="if (this.value == '') {this.value = 'Search...';}" />
  </form>
  <!-- / Search Form -->

 </div><!-- #menu END-->
</div><!-- #navigation END-->
</div><!-- #menu_div END-->