var i=1;

montage1=new Image();
montage1.src="images/caravan.jpg";
montage2=new Image();
montage2.src="images/caravanb.jpg";


montagesrc=new Array(montage1.src,montage2.src);



function rotate(){

               //alert(""+montagesrc[i]);
                  document.images.p1.src=montagesrc[i];
                 if (i==1)i=0
				 else i++;
   
                 timer=setTimeout("rotate()",3500)
                                 
                  }