function rollover(img_name,img_src) {
document[img_name].src=img_src;
}
function bf_preloadImages() {
  var d=document; if(d.images){ if(!d.bf_p) d.bf_p=new Array();
  var i,j=d.bf_p.length,a=bf_preloadImages.arguments; for(i=0; i<a.length; i++) 
  if (a[i].indexOf("#")!=0){ d.bf_p[j]=new Image; d.bf_p[j++].src=a[i];}}
}

function PopupCentrer(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); 
}