jQuery: Radio Button, Checkbox and Selecter

Trigger the event:
$("input[name='lom']").change(function(){
  // Do something interesting here
});

Radio Button:

To get the selected value:
var v=$('input[name=Sex]:checked').val();
if( typeof(v) == 'undefined'){
  //there's no button selected
}

To select radio button from value:
$("input[name=Sex][value='2']").attr('checked',true);

To select radio button from index:
$('input[name=Sex]')[1].checked = true;



Checkbox:

To see whether checkbox is checked:
$('#chk').is(':checked');

To set checkbox:
$("#chk1").attr("checked",'');
$("#chk2").attr("checked",true); 



Selecter:

To get the selected value:
$('#selectList').val();
$('#selectList :selected').text();

To add a new option:
$('#selectList').addOption(value,text);