Add radio button when a radio button is selected (pop up)

Question

How do you Add a 2 radio buttons when (pop up when d1 is
selected)
For example d1a and d1b
When d1 is selected.
<cfoutput>
<cfif isdefined("url.msg")>
#urldecode(url.msg)# <BR />
</cfif>
</cfoutput>
<table border="0" cellpadding="5">
<form id="form1" name="form1" method="post"
action="index.cfm?action=actSearch">
<tr>
<td>please enter id no: </td>
<td><input type="text" name="nbr" /></td>
</tr>
<tr>
<td>B1: </td>
<td><input type="Radio" name="bd" value="b1"
checked="checked"></td>
</tr>
<tr>
<td>D1: </td>
<td><input type="Radio" name="bd"
value="d1r"></td>
</tr>
<tr>
<td></td>
<td><input type="submit" name="Submit"
value="Submit" /></td>
</tr>
</form>
</table>

Answer 1

As you may already know, ColdFusion code runs on the server.
It's not sent out to the web browser. It sends out HTML to the
browser. And what you want to do here is regonize a change that
occurs in the web browser without submitting the form. The way you
can do this is AJAX. If you haven't already done so, check out the
ColdFusion / AJAX library here :
http://ajaxcfc.riaforge.org/.
This will give you a good framework of code to use to do this so
you won't have to reinvent the wheel.