botón de opción de radio verificado predeterminado
<input type="radio" name="imgsel" value="" checked>
SteDeus
<input type="radio" name="imgsel" value="" checked>
//checked
<input type="radio" id="huey" name="drone" value="huey"
checked>
<input type="radio" name="imgsel" value="" checked>
$(':radio:not(:checked)').attr('disabled', true);
<input type="radio" name="imgsel" value="" checked="checked" />