File Upload not Workingin IE

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PHP

Hello guys

i had create one functionality of image preview on file upload,

that is working fine in firefox and crome

but there is a problem in IE,

can you give the ans..??

<img src="#" id="preview"   />

<input type="file" id="userfiles" name="userfile" value="userfiles" class="set_file" 
                                     önchange="javascript:readURL(this)"  />

<script type="text/javascript">
/*$('input.set_file').click(function(){
  document.getElementById("userfiles").onchange = function(evt) {
    alert(evt.target.id);
}
});*/
function readURL(input)
{
	
      if (input.files && input.files[0])
              {
				  
		            var reader = new FileReader();
                   reader.onload = function (e)
                                          {
											  
                                                $('#preview')
                                                .attr('src',e.target.result)
                                                .width(192)
                                                .height(225);
                                          };
                   reader.readAsDataURL(input.files[0]);
                   }
}
</script>