OK. Here's my workaround.
(1) Modified the HTML code by removing the number 2.
Code:
<IMG SRC="ShowEmployeePicture.aspx?ImageID="style="Z-INDEX: 101; LEFT ..... >
(2) Passed my textbox1.text into a session.
VB Code:
session("S_ImageID")=textbox1.text
(3) Called the session from the other page.
VB Code:
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Code (ShowEmployeePicture.aspx ) that accepts the query from the calling page (ShowEmployee.aspx) above.
Dim iImageID
iImageID = Val(Session("S_ImageID"))