var i = 0;
var tm = 5000;
var images = []; 
images[0] = "img1.png"
images[1] = "img2.png"
images[2] = "img3.png"
function imageslide() {
  document.myslide.src =
    images[i]
  if (i < images.length) {
    i++
  } else { i = 0 }
  setTimeout("imageslide()", tm)
}
window.onload = imageslide;