Copy text button, button encrypt and decrypt

function copy(value) {
  var input = document.createElement("input");
  input.setAttribute('value', value);
  input.setAttribute('type', 'text');
  document.body.appendChild(input);
  input.select();
  input.setSelectionRange(0, 99999);
  document.execCommand('Copy');
  document.body.removeChild(input);
  alert("Text copied " + value);
}