Change the color of rounded corners using CSS

Question

thanks a bunch in advance!

I managed to create a rounded corner button using CSS. I like it when you can hover over a button and the whole thing changes color, not just the inner div. Help plz!

My guess is that iam should have some kind of javascript with onmouseover = "", right?

here page: http://biozenconsulting.com/new/

(also, how can I get rid of the small boxes that appear in the right corner when viewed in IE8 and Chrome?)

this is the HTML code:

<div class="nav_menu" onclick="location.href='index.htm'">
    <b class="top_menu"><b class="top_menu1"><b></b></b><b class="top_menu2"><b></b></b><b class="top_menu3"></b><b class="top_menu4"></b><b class="top_menu5"></b></b>
    <div class="top_menufg">
        <!-- content goes here -->
        Home
    </div>
    <b class="top_menu"><b class="top_menu5"></b><b class="top_menu4"></b><b class="top_menu3"></b><b class="top_menu2"><b></b></b><b class="top_menu1"><b></b></b></b>
</div>

and here's the CSS:

.nav_menu {
    text-align: center;
    color: #353535;
    font-size: 20pt;
    font-family: Verdana, Geneva, sans-serif;
    float: left;
    width: 33%;
}

#about {
    margin: 0 .5% 0 .5%;
}

<!-- For rounded boxes -->
.top_menu {
    display:block
    overflow: hidden;
}
.top_menu *{
    display:block;
    height:1px;
    overflow:hidden;
    font-size:.01em;
    background:#AAAAAA
}

.top_menu1{
    margin-left:3px;
    margin-right:3px;
    padding-left:1px;
    padding-right:1px;
    border-left:1px solid #AAAAAA;
    border-right:1px solid #AAAAAA;
    background:#AAAAAA
}
.top_menu2{
    margin-left:1px;
    margin-right:1px;
    padding-right:1px;
    padding-left:1px;
    border-left:1px solid #AAAAAA;
    border-right:1px solid #AAAAAA;
    background:#AAAAAA
}
.top_menu3{
    margin-left:1px;
    margin-right:1px;
    border-left:1px solid #AAAAAA;
    border-right:1px solid #AAAAAA;
}
.top_menu4{
    border-left:1px solid #AAAAAA;
    border-right:1px solid #AAAAAA
}
.top_menu5{
    border-left:1px solid #AAAAAA;
    border-right:1px solid #AAAAAA
}
.top_menufg{
    background:#AAAAAA
}
.top_menufg:hover{
    background-color: #888888;
    cursor: pointer;
}
<!-- For rounded boxes -->

Answer 1

div CSS.

HTML

<a class="nav_menu" href="index.htm">
 <b class="top_menu"><b class="top_menu1"><b></b></b><b class="top_menu2"><b></b></b><b class="top_menu3"></b><b class="top_menu4"></b><b class="top_menu5"></b></b>
 <div class="top_menufg">
  <!-- content goes here -->
  Home
 </div>
 <b class="top_menu"><b class="top_menu5"></b><b class="top_menu4"></b><b class="top_menu3"></b><b class="top_menu2"><b></b></b><b class="top_menu1"><b></b></b></b>
</a>

CSS

.nav_menu {
 text-align: center;
 color: #353535;
 font-size: 20pt;
 font-family: Verdana, Geneva, sans-serif;
 float: left;
 width: 33%;
 text-decoration: none;
}
/* For rounded boxes */
.top_menu {
 display:block
 overflow: hidden;
}    
.top_menu * {
 display:block;
 height:1px;
 overflow:hidden;
 font-size:.01em;
 background:#AAAAAA
}    
.top_menu1 {
 margin-left:3px;
 margin-right:3px;
 padding-left:1px;
 padding-right:1px;
 border-left:1px solid #AAAAAA;
 border-right:1px solid #AAAAAA;
 background:#AAAAAA
}
.top_menu2 {
 margin-left:1px;
 margin-right:1px;
 padding-right:1px;
 padding-left:1px;
 border-left:1px solid #AAAAAA;
 border-right:1px solid #AAAAAA;
 background:#AAAAAA
}
.top_menu3 {
 margin-left:1px;
 margin-right:1px;
 border-left:1px solid #AAAAAA;
 border-right:1px solid #AAAAAA;
}
.top_menu4 {
 border-left:1px solid #AAAAAA;
 border-right:1px solid #AAAAAA
}
.top_menu5 {
 border-left:1px solid #AAAAAA;
 border-right:1px solid #AAAAAA
}
.top_menufg {
 background:#AAAAAA
}
a.nav_menu:hover b, a.nav_menu:hover div  {
 background-color: #888888;
 cursor: pointer;
}
/* For rounded boxes */

Answer 2

Stu Nicholls css play , javascript. .