function change_souscategorie(id){
var serializer_rch;


if (Element.visible($('contenu'))) {Element.toggle('contenu');}

new Ajax.Updater('contenu', 'presta.php?id_souscategorie='+id,{method: 'get', parameters: serializer_rch, evalScripts:true});
Effect.Appear('contenu',{duration:2});


}

function change_lettre(id_lettre){
var serializer_rch;


if (Element.visible($('contenu_lettre'))) {Element.toggle('contenu_lettre');}

new Ajax.Updater('contenu_lettre', 'lexique.php?lettre='+id_lettre,{method: 'get', parameters: serializer_rch, evalScripts:true});
Effect.Appear('contenu_lettre',{duration:2});


}