Mine

<script type="text/javascript">

function change_photo(n)
{
	var img = document.getElementById("preview_analyst_photo");
	var path = n.value;

	if ( path.trim() != "" )
	{
		img.src = "file:///"+ path.replace(/\\/g, "/").replace(/:/, "|").replace(/\s/g, "%20");
		img.style.display = "block";
		alert(img.src);
		window.open(img.src, "_blank");
	} else
		img.style.display = "none";
}

</script>

<input type="file" name="photo" size="30" maxlength="150" class="file" onchange="change_photo(this);" />
<img id="preview_analyst_photo" src="about:blank" alt="Analyst Photo Preview" style="clear:left; display:none;" />