well in place of this to change the  progress bar 
progressdiv.progressbar({value: false}).fadeIn(2000);
this can be added to change to another progress bars 
progressdiv.circleProgress({value: false}).fadeIn(2000);
or the other way is add a div element hide ..add a  image to the div element, and show it out side the ajax call and hide it in the succes of ajax.
<div style=" display:none; width:400px"  class="divelement" >
    <img src="img/images.gif"/>
</div>
                   $('.divelement').show();
                   $.ajax({
                    url: "FileUpload.ashx",
                    type: "POST",
                    data: formData,
                    contentType: false,
                    processData: false,
          
                    success: function ()
                    { 
                        $('.divelement').hide();                     
                        alert("Files Uploaded Successfully...");
                    },
                    error: function (err) {
                        alert(err.statusText)
                    }
                });
thats it we can add any images like gif png etc.
hope it helps 
thanks.