[jQuery] radio value on submit

[Chiste]

I have a problem here. No matter which radio a click, I'm always
getting the value of the firts one. How could I get the value of the
selected radio?


<label><input type="radio" name="transmision" value="1" /> One</label>
<label><input type="radio" name="transmision" value="2" /> Two</label>
<label><input type="radio" name="transmision" value="3" /> Three</
label>
<label><input type="radio" name="transmision" value="4" /> Four</
label>
<label><input type="radio" name="transmision" value="5" /> Five</
label>
<input id="continuar" type="button" value="Continue" />

$("#continuar").click(
        function(){
                var tran = $("input:radio[name='transmision']").val();
                alert("tran"); //always returns 1
        }
)