File Upload Not Working In Firefox

I have in my asp.net page element is not allowed. It works in Chrome as long as the click is triggered by actual human interaction - even if the click event handler of another element triggers the click event on another. I'm only 90% sure about this, though.

Solution 2:

I had the same problem, you can use this code:

<inputid="FileUpload"runat="server"type="file"style="height: 22px; onchange="fill();"/><scriptlanguage="javascript">functionfill()
    {    
      $("#<%=MyTextBox.ClientID%>").val($("#<%=FileUpload.ClientID%>").val())
    }
    </script>