Let us assume we have radio buttons
<input name="rd_name" id="RD1" value="Value One" /> Label 1 <input name="rd_name" id="RD2" value="Value Two" /> Label 2
To retrieve and set radio button values by id we have the following methods. To retrieve we have,
window.alert($("#RD1").val())
and to set the value by id we have
$("#RD1").val('New Value for One')
To check if a paticular button is checked or not we have,
window.alert($("#RD1").attr('checked'))
and to set the status of button to checked or unchecked we can do
$("#RD1").attr("checked", "checked");
Additionaly, to remove a checked status from a radio button we can do
$("#RD1").removeAttr("checked");
Okay, now to perform the above actions by name attribute of the radio button we can do the following.
To print the value of checked radio button
window.alert($('input[name=rd_name]:checked').val());
To set the value of checked input field
$('input[name=rd_name]:checked').val('New value of checked button');
To set the status of a radio button to checked we can do something like the following. Here 0(zero) is the position of first radio button element.
$('input[name="rd_name"]')[0].checked = true;
