jQuery(document).ready(function($) { 
  $(".links_droit img").hover(function(){
  var newsrc = $(this).attr("src").replace("_off", "_on");
  $(this).attr("src",newsrc); 
  },function(){ 
   newsrc = $(this).attr("src").replace("_on", "_off");
  $(this).attr("src",newsrc);
  }); 
  
  if($("body").attr("class") != "") $("#focus a."+$("body").attr("class")+" img").attr("src","/images/focus_"+$("body").attr("class")+"_on.gif");
  
});