Radio buttons

Laser Lips

Hi All. This one has plagued me for a while.

I want to get the value of the selected radio button in 2 ways.
Bearing in mind that the radio buttons are always in a form tag.

1) I want to be able to get the value by using somthing like the
following...

myRadio = document.getElementById("myRadio");
//then somehow get the value of the selected radio button.

2) Have a function which is pased the form element and get to it that
way. eg.

function getVals(form)
{
myrad = form.myRadio
//then somehow get the value of the selected radio button.
}

=========================

Playing with other code i was able to get the value by doing the
following...

<HTML>
<HEAD>
<script>
function GO()
{
alert(rad.length);
for(x=0;x<rad.length;x++)
{
if(rad[x].checked==true)
{
alert(rad[x].value);
}
}
}
</script>
</HEAD>
<BODY>
<input type='radio' name='rad' id='rad' value='answer1'/>1
<input type='radio' name='rad' id='rad' value='answer2'/>2
<input type='radio' name='rad' id='rad' value='answer3'/>3
<input type='radio' name='rad' id='rad' value='answer4'/>4
<button onclick='GO();'>GO</button>
</BODY>
</HTML>

=========================

BUT I dont want to be able to just access the radio button direclty
because in some applications of this code, it doesnt work.

I really want to use document.getElementById and then continue from
that.

Any suggestions?
Graham

Aug 22 '08 #1

Subscribe Post Reply

1270

Laser Lips

On Aug 22, 10:21 am, Laser Lips <loudsphi...@gmail.comwrote:

Hi All. This one has plagued me for a while.

I want to get the value of the selected radio button in 2 ways.
Bearing in mind that the radio buttons are always in a form tag.

1) I want to be able to get the value by using somthing like the
following...

myRadio = document.getElementById("myRadio");
//then somehow get the value of the selected radio button.

2) Have a function which is pased the form element and get to it that
way. eg.

function getVals(form)
{
myrad = form.myRadio
//then somehow get the value of the selected radio button.

}

=========================

Playing with other code i was able to get the value by doing the
following...

<HTML>
<HEAD>
<script>
function GO()
{
alert(rad.length);
for(x=0;x<rad.length;x++)
{
if(rad[x].checked==true)
{
alert(rad[x].value);
}
}
}
</script>
</HEAD>
<BODY>
<input type='radio' name='rad' id='rad' value='answer1'/>1
<input type='radio' name='rad' id='rad' value='answer2'/>2
<input type='radio' name='rad' id='rad' value='answer3'/>3
<input type='radio' name='rad' id='rad' value='answer4'/>4
<button onclick='GO();'>GO</button>
</BODY>
</HTML>

=========================

BUT I dont want to be able to just access the radio button direclty
because in some applications of this code, it doesnt work.

I really want to use document.getElementById and then continue from
that.

Any suggestions?
Graham

Never mind, if I get the form by doing a document.getElementById on
the form and then using the . operator like this, it works....

theForm = document.getElementById("myForm")
alert(theForm.myRadio.length);
Graham

Aug 22 '08 #2

Evertjan.

Laser Lips wrote on 22 aug 2008 in comp.lang.javascript:

<input type='radio' name='rad' id='rad' value='answer1'/>1
<input type='radio' name='rad' id='rad' value='answer2'/>2
<input type='radio' name='rad' id='rad' value='answer3'/>3
<input type='radio' name='rad' id='rad' value='answer4'/>4

Illegal.

id's must be unique.

--
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)

Aug 22 '08 #3

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