XHTML solution: <input type=”radio” name=”imgsel” value=”” checked=”checked” /> Please note, that the actual value of checked attribute does not actually matter; it’s just a convention to assign “checked”. Most importantly, strings like “true” or “false” don’t have any special meaning. If you don’t aim for XHTML conformance, you can simplify the code to: <input type=”radio” … Read more
For versions of jQuery equal or above (>=) 1.6, use: $(“#radio_1”).prop(“checked”, true); For versions prior to (<) 1.6, use: $(“#radio_1”).attr(‘checked’, ‘checked’); Tip: You may also want to call click() or change() on the radio button afterwards. See comments for more info.
To get the value of the selected radioName item of a form with id myForm: $(‘input[name=radioName]:checked’, ‘#myForm’).val() Here’s an example: $(‘#myForm input’).on(‘change’, function() { alert($(‘input[name=radioName]:checked’, ‘#myForm’).val()); }); <script src=”https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js”></script> <form id=”myForm”> <fieldset> <legend>Choose radioName</legend> <label><input type=”radio” name=”radioName” value=”1″ /> 1</label> <br /> <label><input type=”radio” name=”radioName” value=”2″ /> 2</label> <br /> <label><input type=”radio” name=”radioName” value=”3″ /> … Read more