checking if any radio button is checked 1

[FengShui1998]

Hello,

I have multiple radio buttons, all named the same but with different values. I want to check and make sure at least one has been selected. This works for more than one radio button, but if there is only one radio button, it doesn't work.

Here is the code.

function getrdo()

{
var rdo = 'no';
for (var i=0; i < document.usrform.deviceid.length; i++)
{
if (document.usrform.deviceid.checked)
{
var devid = document.usrform.deviceid.value;
rdo = 'yes';
}

}

Any ideas?

 

[vacunita]

Probably because when there's only one radio button the length attribute is undefined. Arrays and strings have lengths. A group of radio buttons is an array therefore it has a length. A single radio button does not beaue its neither a string nor an array.

A simple IF statement can tell you whether there is more than one or not by telling you if length is defined or not.
And you can act accordingly.

if(document.usrform.deviceid.length){
[gray]
 var rdo = 'no';
     for (var i=0; i < document.usrform.deviceid.length;i++)
...
[/gray]
}
else{
 if(document.usrform.deviceid.checked){
    var devid = document.usrform.deviceid.value;
           rdo = 'yes';
 }
}

----------------------------------
Phil AKA Vacunita
----------------------------------
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