[Javascript] problem of only one radio button

[Rodney Myers]

checkbox is not array and has no length
radio buttons with same name form part of an array.
R

Abraham Liu wrote:

> Hi Rodney Myers,
> Thank your answer. I did what you said. But when I check the length of the
> checkbox. It still show undefined instead of 1. Why?
> Can you help me again?
> Thanks.
> Abe Liu
>
> I have the codes as following,
>
> .
> .
> function display_checkQty() {
>      var tot = 0;
>      var val = 0;
>
>      alert("sel-length= "+placeOrder.sel.length);
>      .
>      .
> }
>
> .
> .
> if (rsa.length == 1) {
> %>
>                       <td align="center" bordercolor="#FFFFFF" width="44"
> height="15" <%= bgc %>><input type="checkbox" name="sel"
> value="<%=tknAndUnits%>" onClick="display_checkQty()"></td>
> <%
>    } else {
> %>
>                       <td align="center" bordercolor="#FFFFFF" width="44"
> height="15" <%= bgc %>><input type="radio" name="sel"
> value="<%=tknAndUnits%>" onClick="display_radioQty()"></td>
> <%
>    }
>
> >From: Rodney Myers <rodney at aflyingstart.net>
> >Reply-To: javascript at LaTech.edu
> >To: javascript at LaTech.edu
> >Subject: Re: [Javascript] problem of only one radio button
> >Date: Fri, 20 Jul 2001 15:01:45 +0100
> >
> > > Is it true that radio button will function correctly only at least two
> >of them
> >exist in form ?
> >YES
> >
> > > Is it true that checkbox will function correctly only at least two of
> >them
> >exist in form ?
> >NO, One checkbox is OK
> >
> >I advise that server side you make a count of the rows found.
> >If only one you write a checkbox, and appropriate script
> >If 2 or more write radio buttons.
> >
> >The radio buttons array length returns an error if there is only one RB.
> >
> >hth
> >
> >Rodney
> >
> >
> >Abraham Liu wrote:
> >
> > > Hi,
> > > In my jsp program, I select a number of rows from database table, then
> > > display them in form table. Each row attachs a radio button, So users
> >can
> > > select one of rows and do further process.
> > > The reason I use radio button is that I concatenate 3 table columns and
> > > store them in "value" property of button. When user click button, I use
> > > javascript "split" function to get these 3 columns back. Everything
> >seemed
> > > working just fine. But I realized that if only one row got selected
> >which
> > > meaned only one button exists also, then the fuction of radio button
> >didn't
> > > worked and "split" won't work either. I switched to checkbox, I got the
> >same
> > > result.
> > >
> > > Is it true that radio button and checkbox will function correctly only
> >at
> > > least two of them exist in form ?
> > > In my case, the number of radio button are genarated dynamically
> >depending
> > > on the number rows being selected. So what can I do ? Do I have some
> >other
> > > alternative ways ?
> > > I will be appreciated some kindly help.
> > > Thank you.
> > > Abe Liu
> > >
> > > _________________________________________________________________
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> > >
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> >--
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> >
> >Enquiries regarding Shop at ssistant Classic training :
> >Call 01256 880770
> >
> >Rodney Myers
> >Based in Oxford, England
> >Technical Director, Shop at ssistant eCommerce Solutions
> >
> >
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--
Shop at ssistant Add-ons and Developer Workshops
http://www.aflyingstart.net/addons/

Enquiries regarding Shop at ssistant Classic training :
Call 01256 880770

Rodney Myers
Based in Oxford, England
Technical Director, Shop at ssistant eCommerce Solutions