jQuery: Working with radio buttons

Each time I need to use radio buttons in jQuery I need to look it up - here's the best way to use them I've found so far..

<form id="my-form">
            <input type="radio" name="group-name" value="value1">
            <input type="radio" name="group-name" value="value2">
</form>

// set up the initial value (theValueToSet)
var $log = $("#my-form input[name=group-name]"); // #my-form is optional, but speeds up the search
$log.filter("[value="+theValueToSet+"]").attr("checked","checked")
 
// do something when the value is changed..
$log.change(function() {
   var selectedValue = $(this).val();
});

// getting the value out again later on
var value = $("#my-form input[name=group-name]").val();