voici un script pour l'image
<HTML>
<HEAD>
<TITLE></TITLE>
<SCRIPT>
function changeimage(chemindemonimage){
document.getElementById('monimg').src='chemindemonimage'
}
</SCRIPT>
</HEAD>
<BODY>
<img id='monimg' srs="chemindemonimage0">
<table>
<tr>
<td><img src= "chemin de ma miniture 1" onmouseover= "changeimage('le chemindemonimage1')">
<td><img src= "chemin de ma miniture 2" onmouseover= "changeimage('le chemindemonimage2')">
<td><img src= "chemin de ma miniture 3" onmouseover= "changeimage('le chemindemonimage3')">
<td><img src= "chemin de ma miniture 4" onmouseover= "changeimage('le chemindemonimage4')">
<td><img src= "chemin de ma miniture 5" onmouseover= "changeimage('le chemindemonimage5')">
</td></tr>
</table>
</BODY></HTML>
pour le selecte
<select onChange="self.location =value">
<option value="">Choisissez !
</option>
<option value="page1.html">site 1</option>
<option value="page2.html">site2</option>
</select>