Ne pas faire appel au CSS - JAVASCRIPT

Bonjour,
j'ai actuellement un site tous fait qui marche très bien avec un menu flash.

Le menu flash doit être changé en menu déroulant en JavaScript.

La menu déroulant en JavaScript est déjà créer grâce a "Sothink DHTML Menu".

Il marche très bien dans une page vierge (sans style.css, sans contenue).

Mais lorsque je l'intègre a mon site actuel (déjà fait, avec css, contenue...), le menu est complétement buger.

Il est espacé, les images du menu décalé, les menues déroulant déjà ouvert...

Je présume que c'est le CSS de mon site, mais je n'ai absolument pas envie de changer mon CSS alors je me poser la question, si il n'y avait pas un solution pour dire a mon menu JavaScript de ne pas charger le fichier style.css pour lui (qui ne le prenne pas en compte).

Pouvez-vous m'aider ?

Merci d'avance.

Code JS de mon menue :

<script type="text/javascript">

<!--
stm_bm(["menu5fda",900,"","blank.gif",0,"","",1,0,0,0,50,1,0,0,"","",0,0,1,1,"default","hand","",1,25],this);
stm_bp("p0",[0,4,0,0,1,4,0,7,100,"",-2,"",-2,90,0,0,"#FFCC00","transparent","",3,0,0,"#CCCCCC"]);
stm_ai("p0i0",[1,"<img src=\"http://domaine-cachée.com/wp-content/themes/colourise/4.png\" width=\"130\" height=\"100\" border=\"0\" class=\"img22\" />","","",-1,-1,0,"","_self","","","","",0,0,0,"","",0,0,0,1,1,"#070707",0,"#070707",0,"","",3,3,0,0,"#000000","#000000","#FFFFFF","#CCCCCC","bold 9pt Verdana","bold 9pt Verdana",0,0,"","","","",0,0,0],130,100);
stm_aix("p0i1","p0i0",[1,"<img src=\"http://domaine-cachée.com/wp-content/themes/colourise/1.png\" width=\"245\" height=\"100\" border=\"0\" class=\"img22\" />","","",-1,-1,0,"http://domaine-cachée.com/?page_id=16","_self","","","","",0,0,0,"http://domaine-cachée.com/wp-content/themes/colourise/arrow_r.gif","http://domaine-cachée.com/wp-content/themes/colourise/arrow_r.gif",7,7,0,1,1,"#070707",0,"#070707",0,"","",3,3,0,0,"#CCCCCC","#9690A8"],230,100);
stm_bpx("p1","p0",[1,4,0,0,1,4,0,0]);
stm_aix("p1i0","p0i0",[0,"Hébergement","","",-1,-1,0,"http://domaine-cachée.com/?page_id=16#1","_self","","","","",0,0,0,"","",0,0,0,0,1,"#e2e1e5",0,"#e2e1e5",0,"","",3,3,0,0,"#CCCCCC","#9690A8","#000000","#333333","bold 7pt Verdana","bold 7pt Verdana"]);
stm_aix("p1i1","p1i0",[0,"Espace Bien-être","","",-1,-1,0,"http://domaine-cachée.com/?page_id=16#2"]);
stm_aix("p1i2","p1i0",[0,"Cave personnelle du propriétaire","","",-1,-1,0,"#"]);
stm_aix("p1i3","p1i2",[0,"Visite – Dégustation"]);
stm_aix("p1i4","p1i2",[0,"Jardin des Cépages"]);
stm_aix("p1i5","p1i2",[0,"Séjours à la carte"]);
stm_ep();
stm_aix("p0i2","p0i1",[1,"<img src=\"http://domaine-cachée.com/wp-content/themes/colourise/2.png\" width=\"245\" height=\"100\" border=\"0\" />","","",-1,-1,0,"#"],230,100);
stm_bpx("p2","p1",[]);
stm_aix("p2i0","p1i2",[0,"A deux pas de chez nous"]);
stm_aix("p2i1","p1i2",[0,"La presse parle de nous"]);
stm_aix("p2i2","p1i2",[0,"Localisation"]);
stm_aix("p2i3","p1i2",[0,"Nos partenaires"]);
stm_aix("p2i4","p1i2",[0,"Vos interlocuteurs"]);
stm_ep();
stm_aix("p0i3","p0i1",[1,"<img src=\"http://domaine-cachée.com/wp-content/themes/colourise/3.png\" width=\"245\" height=\"100\" border=\"0\" />","","",-1,-1,0,"#","_self","","","","",0,0,0,"http://domaine-cachée.com/wp-content/themes/colourise/arrow_r.gif","http://domaine-cachée.com/wp-content/themes/colourise/arrow_r.gif",7,7,0,0],230,100);
stm_bpx("p3","p0",[1,4,0,0,1,4,0,7,100,"",-2,"",-2,90,0,0,"#FFCC00","transparent","",3,1,1]);
stm_aix("p3i0","p1i0",[0,"Tarifs","","",-1,-1,0,"#","_self","","","","",0,0,0,"http://domaine-cachée.com/wp-content/themes/colourise/arrow_r.gif","http://domaine-cachée.com/wp-content/themes/colourise/arrow_r.gif",7,7]);
stm_bpx("p4","p3",[1,2,0,0,1,4,0,0]);
stm_aix("p4i0","p1i2",[0,"Basse Saison"]);
stm_aix("p4i1","p1i2",[0,"Haute Saison"]);
stm_ep();
stm_aix("p3i1","p1i2",[0,"Nous contactez"]);
stm_aix("p3i2","p1i2",[0,"Enquête de satisfaction"]);
stm_aix("p3i3","p1i2",[0,"Disponibilités"]);
stm_ep();
stm_ep();
stm_em();
//-->
</script>