rsw,
<!DOCTYPE HTML>
<html>
<head>
<title>Untitled</title>
<script type="text/javascript">
window.onload=function(){
var image1 = document.getElementById("test");
var image2 = document.getElementById("test2");
var i = 0, s = ["block","none"],t = [8000,5000]; //2 сек есть картинка, 5 сек text
function show(){
image1.style.display = s[i];
i ^= 1
image2.style.display = s[i];
setTimeout(show,t[i]);
}
show()
}
</script>
</head>
<body>
<img id="test" src="http://rswbox.ru/files/img515764.jpg">
<div id="test2">text</div>
</body>
</html>