one=new Image;
   one.src="photos/pos01.gif";

   two=new Image;
   two.src="photos/pos02.gif";

   three=new Image;
   three.src="photos/pos03.gif";

   four=new Image;
   four.src="photos/pos04.gif";        

   five=new Image;
   five.src="photos/pos05.gif";

   six=new Image;
   six.src="photos/pos06.gif";
   
   seven=new Image;
   seven.src="photos/pos07.gif";
   
   eight=new Image;
   eight.src="photos/pos08.gif";
   
   nine=new Image;
   nine.src="photos/pos09.gif";
   
   ten=new Image;
   ten.src="photos/pos10.gif";
   
   eleven=new Image;
   eleven.src="photos/pos11.gif";
   
   twelve=new Image;
   twelve.src="photos/pos12.gif";
 
   target1=new Array();
      target1[0]=one.src; 
      target1[1]=two.src;
	  target1[2]=three.src;
      target1[3]="leftone";

   target2=new Array();
      target2[0]=four.src;
	  target2[1]=five.src;
	  target2[2]=six.src;
      target2[3]="rightone";
	  
   target3=new Array();
      target3[0]=seven.src;
      target3[1]=eight.src;
	  target3[2]=nine.src;
      target3[3]="lefttwo";

   target4=new Array();
      target4[0]=ten.src;
	  target4[1]=eleven.src;
	  target4[2]=twelve.src;
      target4[3]="righttwo";
	  
   targets=new Array();
      targets[0]=target1;
      targets[1]=target2;
	  targets[2]=target3;
	  targets[3]=target4;
	  
   targetsLEN=new Array();
      targetsLEN[0]=(target1.length-2);
      targetsLEN[1]=(target2.length-2);
      targetsLEN[2]=(target3.length-2);
	  targetsLEN[3]=(target4.length-2);

   var pause           = 600 ;
   var numberOfTargets = (targets.length-1);
   var targetINDEX     = Math.round(Math.random() * numberOfTargets);
   var imageINDEX      = Math.round(Math.random() * targetsLEN[targetINDEX]);
   var target          = targets[targetINDEX];
   var place           = target[targetsLEN[targetINDEX]+1];
   var pic             = target[imageINDEX];

   function display()
      {
         targetINDEX = Math.round(Math.random() * numberOfTargets);
         imageINDEX  = Math.round(Math.random() * targetsLEN[targetINDEX]);
         target      = targets[targetINDEX];
         place       = target[targetsLEN[targetINDEX]+1];
         pic         = target[imageINDEX];
         window.document.images[place].src=pic;

       }

   function startDisplay() 
      {
         window.setInterval('display()', pause);
      }