Html Horizontal Menu

I need help. I need a horizontal menu i could use in an html page. Can someone please give me a script that makes a horizontal line with onmouseover type to show A box that can use links.

Expanding on Terry's post. You'll need to add CSS

Code:

<div id="navigation">
<ul>
   <li><a href="#">Menu Item 1</a></li>
   <li><a href="#">Menu Item 2</a></li>
   <li><a href="#">Menu Item 3</a></li>
   <li><a href="#">Menu Item 4</a></li>
</ul>
</div>

Code:

#navigation{
width:100%;
height:30px;
background-color:#999;
}
#navigation ul{
margin:0px; padding:0px;
}
#navigation ul li{
display:inline; height:30px; float:left; list-style:none; margin-left:15px;
}
#navigation li a{
color:#fff; text-decoration:none;
}

#navigation li a:hover{
text-decoration:underline;
}


Oops - I beg your pardon. I misread the post and thought that you wanted a vertical menu.

Not a problem terry

Sorry i havnt replied sooner, i meant a horizontal with simple drop down box(yes i know css is needed.)