بفرمایید:
کد HTML:
<html lang="fa">
	<head>
    </head>
    <body>
    	<select name="select" id="select">
        	<option id="1">1</option>
        	<option id="2">2</option>
        	<option id="3">3</option>
        	<option id="4">4</option>
        	<option id="5">5</option>
        	<option id="6">6</option>
        </select>
        <input type="radio" id="1" name="r" />
        <input type="radio" id="2" name="r" />
        <input type="radio" id="3" name="r" />
        <input type="radio" id="4" name="r" />
        <input type="radio" id="5" name="r" />
        <input type="radio" id="6" name="r" />
        <script type="text/javascript" src="jquery.js"></script>
        <script>
			$('input:radio').change(function(){
				var r_id=$(this).attr('id');
				$('option[id="'+r_id+'"]').attr('selected', true);
			});
		</script>
    </body>
</html>