Question

I have a <div> with rabioboxs:

<div id='RB-01'>
<span>Item_1</span><input type='radio' name='RB01' value='1'><br />
<span>Item_2</span><input type='radio' name='RB01' value='2'><br />
<span>Item_3</span><input type='radio' name='RB01' value='3'><br />
</div>

Then with jquery I want to get a radiobox that was checked:

var obj = null;
var tempId = "RB-01";
if ($('div[id=' + tempId + ']')) {
  $('div[id=' + tempId + '] input').each(function() {
  if ($(this).checked == true) { obj = $(this); }
  }); 
}   

but in the end obj = null.

Answer 1

You should do:

if ($(this).is(':checked') == true)

or

 if (this.checked == true)

Of course rember to have at least on of the checkbox checked. Fiddle here http://jsfiddle.net/nicolapeluchetti/Ky6q2/ and here http://jsfiddle.net/nicolapeluchetti/TEw53/