var id = 0;
        var periodical;
        var idimg;

         function jscall(idimmobile){
          //e = new Event(e).stop();
          var url = 'slide_immagini.php?id_immobile='+idimmobile+'&idfoto='+id;
          var request = new Json.Remote(url, {
        		onComplete: function(jsonObj) {
                    id = jsonObj.id;
                 //   alert(id);
               	    window.status='';
                    if(jsonObj.src){
                        $(idimg).src= jsonObj.src;
                    }else{
                        return false;
                    }
                    window.status='';
        		}
          }).send();
        }

        function startcall(idimmagine,idimmobile){
            $clear(periodical); 
            idimg = idimmagine;
            jscall(idimmobile);
        	periodical = jscall.periodical(2000,jscall,idimmobile);

        }

        function stopcall(idimmagine,imgbase){
             var id = 0;
             $clear(periodical);
             $(idimg).src= imgbase;
        }