How can I convert to a CSS Drop down menu - css

Question

New to CSS. I've got a Horizontal menu that I want to convert to a drop down menu.
Here's the CSS:
.menu_container {
position:relative;
}
ul.semiopaquemenu{ /* main menu UL */
font-family: 'Metrophobic', Arial, serif; font-weight: 800;
font-size:18px;
width: 100%;
background: #ccc;
padding: 11px 0 8px 0; /* padding of the 4 sides of the menu */
margin: 0;
text-align: left; /* set value to "left", "center", or "right" to align menu accordingly */
}
ul.semiopaquemenu li{
display: inline;
}
ul.semiopaquemenu li a{
color:white;
padding: 6px 8px 6px 8px; /* padding of the 4 sides of each menu link */
margin-right: 15px; /* spacing between each menu link */
text-decoration: none;
}
ul.semiopaquemenu li a:hover, ul.semiopaquemenu li a.selected{
color: #0080FF;
background: url(data:image/svg+xml;base64,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); /* IE9+ SVG equivalent of linear gradients */
background: -moz-linear-gradient(top, rgba(255,255,255,0.82) 0%, rgba(255,255,255,0.16) 100%); /* fade from white (0.82 opacty) to 0.16 opacity */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(255,255,255,0.82)), color-stop(100%,rgba(255,255,255,0.16)));
background: -webkit-linear-gradient(top, rgba(255,255,255,0.82) 0%,rgba(255,255,255,0.16) 100%);
background: -o-linear-gradient(top, rgba(255,255,255,0.82) 0%,rgba(255,255,255,0.16) 100%);
background: -ms-linear-gradient(top, rgba(255,255,255,0.82) 0%,rgba(255,255,255,0.16) 100%);
background: linear-gradient(top, rgba(255,255,255,0.82) 0%,rgba(255,255,255,0.16) 100%);
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#d1ffffff', endColorstr='#29ffffff',GradientType=0 );
-moz-box-shadow: 0 0 10px #595959; /* CSS3 box shadows */
-webkit-box-shadow: 0 0 10px #595959;
box-shadow: 0 0 10px #595959;
padding-top: 12px; /* large padding to get menu item to protrude upwards */
padding-bottom: 9px; /* large padding to get menu item to protrude downwards */
}
.semiopaquemenu ul {
position:absolute;
left:-9999px;
top:-9999px;
list-style-type:none;
}
.semiopaquemenu li:hover {
position:relative;
}
.semiopaquemenu li:hover ul {
left:0px;
top:30px;
padding:3px;
width:160px;
}
.semiopaquemenu li:hover ul li {
height:18px;
border:none;
}
.semiopaquemenu li:hover ul li a {
height:18px;
padding:0px;
display:block;
width:158px;
line-height:18px;
text-indent:5px;
}
.semiopaquemenu li:hover ul li a:hover {
height:18px;
}
Here's my HTML:
<ul class="semiopaquemenu">
<li>Home</li>
<li>Messaging</li>
<li>Directory</li>
<li>Options</li>
</ul>
How can I convert menu item "Options" to a drop down???
Thanks!

Answer 1

demo jsBin
Add this lines and play around:
CSS:
ul.semiopaquemenu > li > ul{
background:#ccc;
padding:15px 20px;
}
ul.semiopaquemenu > li > ul li {
color:white;
cursor:pointer;
display:block;
padding:4px 10px;
}
HTML:
<ul class="semiopaquemenu">
<li>Home</li>
<li>Messaging</li>
<li>Directory</li>
<li>
Options
<ul>
<li>Option 1</li>
<li>Option 2</li>
<li>Option 3</li>
<li>Option 4</li>
</ul>
</li>
</ul>

Answer 2

Well, for starters you'll need some extra list items to actually have something to "drop down", so another <ul>. The place to put it is <li>Options RIGHT HERE </li>. To get something going, just copy/paste the HTML you already have into itself at that point:
<ul class="semiopaquemenu">
<li>Home</li>
<li>Messaging</li>
<li>Directory</li>
<li>Options
<ul class="semiopaquemenu">
<li>Home</li>
<li>Messaging</li>
<li>Directory</li>
<li>Options</li>
</ul>
</li>
</ul>
Which with your current CSS produces this, a working drop down menu: http://jsfiddle.net/yAmWb/