function Tricolore25aprile2009()
       {
                 bgPOSarray=new Array();
                            bgPOS=document.getElementById("Tricolore25aprile2009").style.backgroundPosition;
                 bgPOSarray=bgPOS.split(" ");
                 bgPOSx    =parseInt(bgPOSarray[0]);
                 bgPOSy    =parseInt(bgPOSarray[1]);
                                                                        if(bgPOSy==-320) { bgPOSy=0; }
                                                                                           bgPOSy=bgPOSy-1;
         document.getElementById("Tricolore25aprile2009").style.backgroundPosition=" 0px "+bgPOSy+"px";

         Tricolore25aprile2009timeout=setTimeout("Tricolore25aprile2009()",50);
       }