File Upload Jquery validation

<form name="upload" action="">
<input type="file" name="fUpload" id="fUpload" onchange="GetFileSize('fUpload')" />
<input type="button" value="Get File Size" onclick="GetFileSize('fUpload');" />
</form>

<script src="http://code.jquery.com/jquery-1.7.1.min.js" type="text/javascript" > </script>
 <script type="text/javascript">
     function GetFileSize(fileid) {
         try {
             var fileSize = 0;
             //for IE
             if ($.browser.msie) {
                 //before making an object of ActiveXObject,
                 //please make sure ActiveX is enabled in your IE browser
                 var objFSO = new ActiveXObject("Scripting.FileSystemObject"); var filePath = $("#" + fileid)[0].value;
                 var objFile = objFSO.getFile(filePath);
                 var fileSize = objFile.size; //size in kb
                 fileSize = fileSize / 1048576; //size in mb
             }
                 //for FF, Safari, Opeara and Others
             else {
                 fileSize = $("#" + fileid)[0].files[0].size //size in kb
                 fileSize = fileSize / 1048576; //size in mb
             }
             alert("Uploaded File Size is " + fileSize + "MB");
         }
         catch (e) {
             alert("Error is :" + e);
         }
     }
 </script>