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set the visibilty of the cells which contain those radiobuttons to "hidden",
then to "visible" when you want them to appear
 
e.g. 
 
<tr><td class=graybg valign=left id="mycell" style="visibility:hidden">
 
then to show
 
document.getElementbyId("mycell").style.visibility="visible";
 
you could also use the display property rather than visibilty

-----Original Message-----
From: Keith Blyth [mailto:keithblyth@h...]
Sent: 12 February 2002 18:06
To: JavaScript HowTo
Subject: [javascript_howto] hide and display a set of radio buttons


Hi 
I have a javascript and asp page that will builds an online survey.  This
builds all the table rows and cells need and the type of question to be
displayed. What i want to do is for the two elements below . I want tthe 3
choices of the radio button 172 to be hidden unles the user selects yes in
the prev question.
 
 
<form name="1" method="post" action="/whq/survey.asp">
  <table width="600" border="0" cellspacing="0" cellpadding="0">
    <tr>    
       
    <INPUT type=hidden name=170 value = "">
    <tr><td align=left valign=middle colspan=2><br><div
class=QuestionTitle>Q14. Does your institution use a Virtual Learning
environment?</div><br></td></tr>
    <tr><td align=left valign=middle colspan=2><b></b></td></tr>
    <tr><td class=graybg valign=left><INPUT name=171 type=radio
value="Yes">Yes</td>
    <td class=graybg valign=left><INPUT name=171 type=radio value="No">No 
 
    <INPUT type=hidden name=171 value = "">
    <tr><td align=left valign=middle colspan=2><b></b></td></tr>
    <tr><td class=graybg valign=left><INPUT name=172 type=radio
value="WebCT">WebCT</td>
    <td class=graybg valign=left><INPUT name=172 type=radio
value="Blackboard">Blackboard</td></tr>
    <td class=graybg valign=left colspan=2><INPUT name=172 type=radio
value="Other">Other</td></tr>
</table>
 
 
I can ammend the function that builds the questions from the database, such
that it adds "disabled" to those RADIO BUTTONES that follow a conditional
question. What i can not do is remove this "disabled " after the user
answers yes.
 
Thanks Keith
$subst('Email.Unsub'). 


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