var time

function FirstImage() {
  if (document.images) {
        clearTimeout(time)
        document.banner.src="assets/images/index_photo1.jpg";
        time=setTimeout("SecondImage()",5000);
      }
}


function SecondImage() {
  if (document.images) {
        clearTimeout(time)
        document.banner.src="assets/images/index_photo2.jpg";
        time=setTimeout("ThirdImage()",5000);
      }
}

function ThirdImage() {
  if (document.images) {
        clearTimeout(time)
        document.banner.src="assets/images/index_photo3.jpg";
        time=setTimeout("FirstImage()",5000);
      }
}