[Javascript] problem of only one radio button

[Rodney Myers]

OK, but I was suggesting using checkbox when there was just one item!
So we must have had some difference of viewpoint on this.
Personally I am not in the habit of setting up arrays of checkboxes or text
fields.
I understand that support for such arrays is not uniform.
Thanks for the comment.
R

Abraham Liu wrote:

> Hi Rodney Myers,
> According to JavaScript - The definitive Guide 3rd Edition page 439,
> checkbox does have "length" if you have a group checkboxes.  Otherwise, you
> can pull the value out directly by using placeOrder.sel.value, in my case.
> But your suggestion makes my program working and I learned something too.
> Thank you for the valuable suggestion.
> Abe Liu
>
> >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 17:18:58 +0100
> >
> >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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> >Rodney Myers
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> >Technical Director, Shop at ssistant eCommerce Solutions
> >
> >
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Rodney Myers
Based in Oxford, England
Technical Director, Shop at ssistant eCommerce Solutions