Voici le code que j'avais dans le head :
<script type="text/javascript">
<!--
function MM_findObj(n, d) { //v4.01
var p,i,x; if(!d) d=document; if((p=n.indexOf("?" ))>0&&parent.frames.length) {
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_showHideLayers() { //v6.0
var i,p,v,obj,args=MM_showHideLayers.arguments;
for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
if (obj.style) { obj=obj.style; v=(v=='show')?'visible'v=='hide')?'hidden':v; }
obj.visibility=v; }
}
//-->
</script>
Ensuite, dans la page html :
<h4>Veuillez choisir une catégorie : </h4>
<br />
<div id="menucataloguegauche">
<a onmouseout="MM_showHideLayers('Layer1','','hide')" onmouseover="MM_showHideLayers('Layer1','','show')" href="#"> blabla1 </a>
<a onmouseout="MM_showHideLayers('Layer2','','hide')" onmouseover="MM_showHideLayers('Layer2','','show')" href="#"> blabla2 </a>
</div>
<div id="menucataloguedroite">
<div id="Layer1" style="visibility: hidden;">
<ul><li> texte blabla1 </ul></li><br /></div>
<div id="Layer2" style="visibility: hidden;">
<ul><li> texte blabla2 </ul></li><br /></div>
</div>
Chercher l'(les) intru(s) ...