Text box to appear when a radio button is selected

I want to get a text box to appear when a radio button is selected yes . This is what my code looks like;

Care of Address? <br>
Yes<input type="radio" name="radio1" value="Yes" onClick="getResults(this)">
No<input type="radio" name="radio1" value="No" onclick="getResults(this)">

<div class="text"><p>Address Line 1  <input type="text" name="text1" id="text1" maxlength="30"></p></div>
<div class="text"><p>Address Line 2 <input type="text" name="text2" id="text2" maxlength="30"></p></div>
<div class="text"><p>Address Line 3  <input type="text" name="text3" id="text3" maxlength="30"></p></div>
<div class="text"><p>Address Line 4 <input type="text" name="text4" id="text4" maxlength="30"></p></div>
<div class="text"><p>Postcode  <input type="text" name="text5" id="text5" maxlength="30"></p></div>

<script> 
    (document).ready(function() {
        (".text").hide()

    });
    function getResults(elem) {
        elem.checked && elem.value == "Yes" ? (".text").show() : (".text").hide();
    };
    </script>

Can anyone help me

Abi