[thelist] request JS help for quiz

[Kristof Neirynck]

I don't quite see why you'd write it that way
this is how I do it

Kristof

<script type="text/javascript">
    //f = name of form
    //n = name of group
    function getValue(f,n)
    {
        var g = document.forms[f].elements[n];
        var retval = 'error - none checked';//value of the checker
radoibutton
        var retnr = -1;//number of the checked radiobutton
        for (var i = 0; i<g.length; i++)
        {
            if (g[i].checked)
            {
                retval = g[i].value;
                retnr = i;
            }
        }
        //return retval;//choose what you want returned (in your case
the number)
        return retnr;
    }
</script>


<form name="quizform"
onsubmit="alert(getValue('quizform','question_01'));return false;">
What's the number?<br />
<input type='radio' name='question_01' value='one' />1<br />
<input type='radio' name='question_01' value='two' />2<br />
<input type='radio' name='question_01' value='three' />3<br />
<input type='radio' name='question_01' value='four' />4<br />
<input type='submit' value=' - Submit - '>
</form>



Sharon F. Malone wrote:

>Dear List:
>
>I'm not so hot at Javascript and am trying to get a quiz to work using it. Keep getting this error. Wondered if someone could help?
>
>This is the error message Netscape generates from the console:
>
>JavaScript Error: [unknown origin]:
>
>missing ; before statement.
>
>line 34 char 18
>.....^
>
>JavaScript Error:
>file:/E|/Sharon/Cheftrain/html/QuizExperiment.html, line 34:
>
>ButtonGroup has no properties.
>
>This is the error message EditPlus generates:
>
>l. 34 char 18 'length' is null or not an object
>Code: 0
>
>
>This is the code:
>
> function GetSelectedButton(ButtonGroup)
>{
>  for (var x=0;x<ButtonGroup.length;x++)
>    if (ButtonGroup[x].checked) return x
>  return 0
>}
>
>It generates the error at the "x" to the left of <ButtonGroup.length;x++)
>
>Best,
>Sharon
>---------------------------------------------------------------------------
>Sharon F. Malone
>"web design and Internet writing services"
>http://www.24caratdesign.com
>sfmalo at 24caratdesign.com
>
>