ul.topnav {
list-style: none;
padding: 0 20px;
margin: 0;
width: 100%;float: left;
background: #222;
font-size: 1.2em;
background: url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhrLbNWzBXN88SHMRlbzLqqrBIs4Jb75cmm1c9Oi18CmAuYJymzSEdjqB3yKbSGb8WdxxxKXlsiQiI75cs6ZMgQnC1B8EnafX0terPeE_tUKStUtrfFNPNcHAAWsMJEGKCQQwtOEV1S2h8X/s1600/topnav_bg-namkna-ngoctra.png) repeat-x;
z-index:100}
ul.topnav li {
float: left;
margin: 0;
padding: 0 15px 0 0;
position: relative; /*--Declare X and Y axis base--*/z-index:100}
ul.topnav li a{
padding: 10px 5px;
color: #fff;display: block;
text-decoration: none;
float: left;
}
ul.topnav li a:hover{
background: url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhLDdBE6YGDEF8WZP5i9lnQetLaQ7cSreII3z0yc3nk7WXni70CsFe-cC9Nq5klhs-A4rYVaeGZcyBCJI1bjBiSzGLKVRAsRNVggyc9ZZnH8ieOM3Zp4GidcRz1h7aefhOJ_RyaxBxkwIrC/s1600/topnav_hover-namkna-ngoctra.png) no-repeat center top;
z-index:100}
ul.topnav li span { /*--Drop down trigger styles--*/width: 17px;
height: 35px;
float: left;
background: url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhpocqtn5M6PE1vXraBURD464Msc2CccQgck6vFsFgfWKWRJHj0kqsYpIuLWe-R2-Wkg9YXnMEPP6KQ2LNjd0U-R4DzBazXw3aB2uyVERr-JYjyCpGccVwtzqFH1c5tJzYBIh69hSyYVD7F/s1600/subnav_btn-namkna-blogspot-ngoctra.png) no-repeat center top;
}
ul.topnav li span.subhover {background-position: center bottom; cursor: pointer;} /*--Hover effect for trigger--*/
ul.topnav li ul.subnav {
list-style: none;
position: absolute; /*--Important - Keeps subnav from affecting main navigation flow--*/left: 0; top: 35px;
background: #333;
margin: 0; padding: 0;
display: none;
float: left;
width: 170px;
-moz-border-radius-bottomleft: 5px;
-moz-border-radius-bottomright: 5px;
-webkit-border-bottom-left-radius: 5px;
-webkit-border-bottom-right-radius: 5px;
border: 1px solid #111;
}
ul.topnav li ul.subnav li{
margin: 0; padding: 0;
border-top: 1px solid #252525; /*--Create bevel effect--*/border-bottom: 1px solid #444; /*--Create bevel effect--*/clear: both;
width: 170px;
}
html ul.topnav li ul.subnav li a {
float: left;
width: 145px;
background: #333 url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgnC3WpLBc-ovQZg1gDMsalRE7Kj5jhVnHo5L0y0vzKf5v1OW-LZLRRRwjAkGpcqqNZB6YTrZz31wF03zQ7XMCVaIqyVC31SCORaZAaexAs7FFoQqdxRe2Y60R33DveGwgZeSDGYCKJe5qx/s1600/dropdown_linkbg-namkna-blogspot-ngoctra.png) no-repeat 10px center;
padding-left: 20px;
}
html ul.topnav li ul.subnav li a:hover { /*--Hover effect for subnav links--*/background: #222 url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgnC3WpLBc-ovQZg1gDMsalRE7Kj5jhVnHo5L0y0vzKf5v1OW-LZLRRRwjAkGpcqqNZB6YTrZz31wF03zQ7XMCVaIqyVC31SCORaZAaexAs7FFoQqdxRe2Y60R33DveGwgZeSDGYCKJe5qx/s1600/dropdown_linkbg-namkna-blogspot-ngoctra.png) no-repeat 10px center;
}
#header img {
margin: 20px 0 10px;
}

<script src='https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js' type='text/javascript'/>
<script type='text/javascript'>
$(document).ready(function(){
$(&quot;ul.subnav&quot;).parent().append(&quot;<span/>&quot;); //Only shows drop down trigger when js is enabled - Adds empty span tag after ul.subnav $(&quot;ul.topnav li span&quot;).click(function() { //When trigger is clicked... //Following events are applied to the subnav itself (moving subnav up and down)
$(this).parent().find(&quot;ul.subnav&quot;).slideDown(&#39;fast&#39;).show(); //Drop down the subnav on click $(this).parent().hover(function() {
}, function(){
$(this).parent().find(&quot;ul.subnav&quot;).slideUp(&#39;slow&#39;); //When the mouse hovers out of the subnav, move it back up});
//Following events are applied to the trigger (Hover events for the trigger)
}).hover(function() {
$(this).addClass(&quot;subhover&quot;); //On hover over, add class &quot;subhover&quot;
}, function(){ //On Hover Out
$(this).removeClass(&quot;subhover&quot;); //On hover out, remove class &quot;subhover&quot;
});
});
</script>

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