Front-end Image Upload with Preview – Is this Possible in WP?

Just add this scripts in header

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script>
   var blank="http://upload.wikimedia.org/wikipedia/commons/c/c0/Blank.gif";
     function readURL(input) {
       if (input.files && input.files[0]) {
        var reader = new FileReader();

         reader.onload = function (e) {
           $('#img_prev')
           .attr('src', e.target.result)
           .height(100);
         };

        reader.readAsDataURL(input.files[0]);
    }
      else {
      var img = input.value;
        $('#img_prev').attr('src',img).height(200);
    }
    $("#x").show().css("margin-right","10px");
}
$(document).ready(function() {
  $("#x").click(function() {
    $("#img_prev").attr("src",blank);
    $("#x").hide();  
  });
});
</script>

Add for Internet explorer:

<!--[if IE]>
<script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->

Add style to the header.

<style>
 article, aside, figure, footer, header, hgroup, menu, nav, section { display: block; }
 #x { display:none; position:relative; z-index:200; float:right}
 #previewPane { display: inline-block; }
</style>

Note this should be added in header of that page or ur theme
and this will be upload bar
with preview
u can also cancel the preview with this

<input type="file" onchange="readURL(this);" /><br/>


<span id="previewPane">
 img id="img_prev" src="#" alt="your image" />
 span id="x">[X]</span> </div> </div>