var image1=new Image()
image1.src="images/sohva1.jpg"
var image2=new Image()
image2.src="images/sohva2.jpg"
var image3=new Image()
image3.src="images/sohva3.jpg"
var image4=new Image()
image4.src="images/sohva4.jpg"

function fSlideIt() {
  //if browser does not support the image object, exit.
  if (!document.images)
    return;
  document.images.slide.src = eval("image"+step+".src");
  if (step < 4) {
    step++;
  } else {
    step=1;
  }
  setTimeout("fSlideIt()",4000);
}