function pop(page,largeur,hauteur,options) {
  var top=(screen.height-hauteur)/2;
  var left=(screen.width-largeur)/2;
  window.open(page,"","top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+options);
}


var roll = new Array();
for(cpt=0;cpt<=11;cpt++) roll[cpt] = new Image();
roll[0].src="img/top/accueil_on.gif";
roll[1].src="img/top/accueil_off.gif";
roll[2].src="img/top/comment_on.gif";
roll[3].src="img/top/comment_off.gif";
roll[4].src="img/top/lire_on.gif";
roll[5].src="img/top/lire_off.gif";
roll[6].src="img/top/soumettre_on.gif";
roll[7].src="img/top/soumettre_off.gif";
roll[8].src="img/top/partenaires_on.gif";
roll[9].src="img/top/partenaires_off.gif";
roll[10].src="img/top/contact_on.gif";
roll[11].src="img/top/contact_off.gif";

function image(nom,num){
	document[nom].src=roll[num].src;
}