Dropline menu

While learning I wanted to create a horizontal menu. This fiddle contains the code for the same.

by Avdhut Sonpethkar

HTML

<div id="menucontainer">
    <ul id="hmenu">
        <li class="parent_menu"><a href="#">Home</a>

        </li>
        <li class="parent_menu"><a href="#">About</a>

            <ul>
                <li class="child_menu"><a href="#">Test 1</a>

                </li>
                <li class="child_menu"><a href="#">Test 2</a>

                </li>
            </ul>
        </li>
        <li class="parent_menu"><a href="#">Contact Us</a>

            <ul>
                <li class="child_menu"><a href="#">Test 1</a>

                </li>
                <li class="child_menu"><a href="#">Test 2</a>

                </li>
                <li class="child_menu"><a href="#">Test 3</a>

                </li>
            </ul>
        </li>
        <li class="parent_menu"><a href="#">Information</a>

            <ul>
                <li class="child_menu"><a href="#">Test 1</a>

                </li>
                <li class="child_menu"><a href="#">Test 2</a>

                </li>
                <li class="child_menu"><a href="#">Test 3</a>

                </li>
                <li class="child_menu"><a href="#">Test 4</a>

                </li>
            </ul>
        </li>
    </ul>
</div>

CSS

/*
Techonolgy Quest;

creating a horizontal menu is simple.

Following id will define the dimensions for the menu, margin, padding width, height.
*/
 #menucontainer {
    margin: 0px;
    padding: 0px;
    width: 100%;
    height: 100px;
}
#menucontainer ul {
    margin: 0px;
    padding: 0px;
    list-style: none;
    width: 600px;
    height:40px;
}
/* Following selector will define the style for individual menu or li tags. The following style gives them a look when the menus are not selected.
note that the position proerty is set to relative and dispaly is inline.
*/
 #menucontainer ul li.parent_menu {
    list-style: none;
    margin: 0px;
    padding: 10px;
    background-color:#69A9B1;
    display: inline;
    width: 100%;
    height: 100%;
    border-right: 3px solid #6A91A8;
}
/* Style for the anchor tag defined in the menu. 
*/
 #menucontainer ul li.parent_menu a {
    margin-left: 10px;
    padding-left: 10px;
    margin-right: 10px;
    padding-right: 10px;
    background-color:transparent;
    display: inline;
    text-decoration: none;
    font-family:"Times New Roman", "Arabic";
    font-size: 20px;
    color: #E3E3C0;
    line-height: 50px;
}
/* The hover effect is defined using the below selectors
For the background-color the function rgba is used to create a semi-transperant look as a hover effect
*/
 #menucontainer ul li.parent_menu:hover {
    list-style: none;
    margin: 0px;
    padding: 10px;
    opacity: 0.8;
    background-color:#69A9B1;
    display: inline;
    border-right:3px solid #6A91A8;
}
#menucontainer ul li.parent_menu:hover a {
    list-style: none;
    margin-left: 10px;
    padding-left: 10px;
    margin-right: 10px;
    padding-right: 10px;
    background-color:transparent;
    display: inline;
    text-decoration: none;
    font-family:"Times New Roman", "Arabic";
    font-size: 20px;
    color:black;
    line-height: 33px;
}
/***************SUB MENU***********************/
 #menucontainer ul li.parent_menu ul {
    margin:...