Hi there... a quick question. Howcome the picure dissapears when I wrap an anchor around it... Isnīt this pretty basic stuff?

Code HTML4Strict:
<div id="images">
    <a href="my.url"><img id="image1" src="/themes/cleanmachine/images/alfasoft_preview.jpg" alt="Alfasoft"/></a>
    <img id="image2" src="2.jpg" />
    <img id="image3" src="3.jpg" />
    <img id="image4" src="4.jpg" />
    <img id="image5" src="5.jpg" />
</div>
<div id="slider">
    <a href="#image1">1</a>
    <a href="#image2">2</a>
    <a href="#image3">3</a>
    <a href="#image4">4</a>
    <a href="#image5">5</a>
</div>

Code CSS:
#images {
    width: 500px;
    height: 200px;
    overflow: hidden;
    position: relative;
 
    margin: 15px;
}
#images img {
    width: 500px;
    height: 200px;
 
    position: absolute;
    top: 0;
    left: -400px;
    z-index: 1;
    opacity: 0;
 
    transition: all linear 500ms;
    -o-transition: all linear 500ms;
    -moz-transition: all linear 500ms;
    -webkit-transition: all linear 500ms;
}
#images img:target {
    left: 0;
    z-index: 9;
    opacity: 1;
}
#images img:first-child {
    left: 0;
}
#slider  {
    margin-left: 30%;
 
}
#slider a {
    text-decoration: none;
    background: #E3F1FA;
    border: 1px solid #C6E4F2;
    padding: 4px 6px;
    color: #222;
 
}
#slider a:hover {
    background: #C6E4F2;
}