select by default radio input code example
Example 1: auto select radio button
<input type="radio" name="imgsel" value="" checked>
Example 2: radio selected
//checked
<input type="radio" id="huey" name="drone" value="huey"
checked>
<input type="radio" name="imgsel" value="" checked>
//checked
<input type="radio" id="huey" name="drone" value="huey"
checked>