var leftimages=new Array();
var i=0;
leftimages[i++]="images/photo_3.jpg";
leftimages[i++]="images/photo_2.jpg";
leftimages[i++]="images/photo_5.jpg";
leftimages[i++]="images/photo_4.jpg";
jQuery(document).ready(function() {
  i=0;
  interval=setInterval(function(){nextImage()},5000)
});
function nextImage(){
  // sequential
  i++;
  if(i>=leftimages.length) i=0;
  // random
  //i=Math.floor(Math.random()*leftimages.length);
  jQuery("#leftimages").fadeOut(150,
  function(){
  jQuery("#leftimages").html('<img src="'+leftimages[i]+'" width="160" height="106" alt="" />');
  jQuery("#leftimages").fadeIn(150);
  });
}