Código HTML:
<script> function ver(image) { document.getElementById('image').innerHTML = "<img src='"+image+"'>" } </script> <form action="sube.php" method="post" enctype="multipart/form-data"> Archivo: <input name="file" type="file" onChange="ver(form.file.value)"> <input name="submit" type="submit" value="Upload!"> </form><br> <span id="image"></span>
![Negando](http://static.forosdelweb.com/fdwtheme/images/smilies/negar.gif)