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Viewed 926k times 573 92 I can set a radio button to checked fine, but what I want to do is setup a sort of 'listener' that activates when a certain radio button is checked. Take, for example the following code: $("#element").click(function(){$('#radio_button').attr("checked", "checked"); }); it adds a checked attribute and all is well, but how would I go about adding an alert. For example, that pops up when the radio button is checked without the help of the click function? jquery html jquery-ui checked shareimprove this question edited Sep 25 '19 at 11:28 DurkoMatko 91522 gold badges66 silver badges1818 bronze badges asked Feb 16 '10 at 11:33 Keith Donegan 23.4k3030 gold badges8686 silver badges125125 bronze badges 2 possible duplicate of Check of specific radio button is checked – Felix Kling Jul 20 '12 at 14:31 1 related Monitoring when a radio button is unchecked stackoverflow.com/questions/5824639/… – Adrien Be Jul 7 '14 at 11:55 jQuery is still popular, but if you want to have no dependencies, see below. Short & clear function to find out if radio button is checked on ES-2015: stackoverflow.com/a/55917739/9769604 – MaxWall Apr 30 '19 at 9:21 add a comment 17 Answers activeoldestvotes 1057 $('#element').click(function(){if($('#radio_button').is(':checked')){alert("it's checked"); }}); shareimprove this answer edited Nov 2 '11 at 11:52 answered Feb 16 '10 at 11:38 David Hedlund 116k2727 gold badges194194 silver badges209209 bronze badges Bingo! thanks David. So would I have to invoke an action (click etc) to show the alert? Is there a way to do this without clicking? – Keith Donegan Feb 16 '10 at 11:50 3 This doesn't solve the "without the help of the click function", does it? – Znarkus Feb 16 '10 at 11:58 5 @Znarkus: OP appears satisfied. would you argue that you own use of ('#radio_button').click is without click? – David Hedlund Feb 16 '10 at 12:05 3 @David Second line should be if ($('#radio_button').is(':checked'))){alert("it's checked"); }- you forgot the jQuery $ sign and then need to wrap it all in some more parenthesis. – zuallauz Nov 2 '11 at 8:28 2 @zua: you're right! it even had a syntax error, the way it was before (unmatched brackets). fixed – David Hedlund Nov 2 '11 at 11:53 show 4 more comments 152 If you have a group of radio buttons sharing the same name attribute and upon submit or some event you want to check if one of these radio buttons was checked, you can do this simply by the following code : $(document).ready(function(){$('#submit_button').click(function(){if (!$("input[name='name']:checked").val()){alert('Nothing is checked!'); return false; }else { alert('One of the radio buttons is checked!'); }}); });