Javascript Only - Enable form fields with checkboxes

JavaScript Only - Enable form fields. If either checkbox is checked the 2 Email fields should be enabled.

HTML

<form id="myForm">
    <h3>Section 1</h3>
    Checkbox 1: <input type="checkbox" name="checkbox1" id="checkboxOne" onclick="enableDisableTextFields();" />
    <p><input type="text" id="emailAddr" name="myEmailAddr" placeholder="Indique " disabled /></p>
   
    
</form>

JavaScript

function enableDisableTextFields() {
    cb1 = document.getElementById('checkboxOne').checked;
   
    document.getElementById('emailAddr').disabled = !(cb1);
 
}