[PHP] pobierz, plaintext 
function myFunction() {
  // Get the checkbox
  var checkBox = document.getElementById("myCheck");
  // Get the output text
  var text = document.getElementById("text");
 
  // If the checkbox is checked, display the output text
  if (checkBox.checked == true){
    text.style.display = "block";
  } else {
    text.style.display = "none";
  }
} 
[PHP] pobierz, plaintext 

[PHP] pobierz, plaintext 
choroba: <input type="checkbox" id="myCheck" onclick="myFunction()">
brak choroby: <input type="checkbox">
 
<p id="text" style="display:none">Checkbox is CHECKED!</p>
[PHP] pobierz, plaintext