shaltay,
Вариант ...
<!DOCTYPE html>
<html>
<head>
<title></title>
<style type="text/css">
#pic1{position: relative; width: 336px; height: 76px;}
</style>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.js"></script>
<script type="text/javascript">
$(function() {
(function(){
$('#pic1').animate({'width':'0px','left':'336px'},1500, function(){
$('#pic1').css({left:'0px'})} ).animate({'width':'336px'},1500 );
arguments.callee()
})()
});
</script>
</head>
<body>
<img id="pic1" src="http://javascript.ru/forum/images/ca_serenity/misc/logo.gif" />
</body>
</html>