Hi @GaurangJ
It's not possible, but you can do a trick here.
You can hide the fileupload control and call it's event on button click. Here is the working example
<input type="file" id="fileLoader" name="files" title="Load File" style = "display:none;" />
<input type="button" id="btnOpenFileDialog" value = "Click Me !!!" onclick="openfileDialog();" />
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script type="text/javascript">
function openfileDialog() {
$("#fileLoader").click();
}</script>
Demo