如何创建带有“是”和“否”选项的对话框？

// Call function when show dialog btn is clicked
document.getElementById("btn-show-dialog").onclick = function(){show_dialog()};
var overlayme = document.getElementById("dialog-container");

function show_dialog() {
 /* A function to show the dialog window */
    overlayme.style.display = "block";
}

// If confirm btn is clicked , the function confim() is executed
document.getElementById("confirm").onclick = function(){confirm()};
function confirm() {
 /* code executed if confirm is clicked */   
    overlayme.style.display = "none";
}

// If cancel btn is clicked , the function cancel() is executed
document.getElementById("cancel").onclick = function(){cancel()};
function cancel() {
 /* code executed if cancel is clicked */  
    overlayme.style.display = "none";
}

.popup {
  width: 80%;
  padding: 15px;
  left: 0;
  margin-left: 5%;
  border: 1px solid rgb(1,82,73);
  border-radius: 10px;
  color: rgb(1,82,73);
  background: white;
  position: absolute;
  top: 15%;
  box-shadow: 5px 5px 5px #000;
  z-index: 10001;
  font-weight: 700;
  text-align: center;
}

.overlay {
  position: fixed;
  width: 100%;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,.85);
  z-index: 10000;
  display :none;
}

@media (min-width: 768px) {
  .popup {
    width: 66.66666666%;
    margin-left: 16.666666%;
  }
}
@media (min-width: 992px) {
  .popup {
    width: 80%;
    margin-left: 25%;
  }
}
@media (min-width: 1200px) {
  .popup {
    width: 33.33333%;
    margin-left: 33.33333%;
  }
}

.dialog-btn {
  background-color:#44B78B;
  color: white;
  font-weight: 700;
  border: 1px solid #44B78B;
  border-radius: 10px;
  height: 30px;
  width: 30%;
}
.dialog-btn:hover {
  background-color:#015249;
  cursor: pointer;
}

<div id="content_1" class="content_dialog">
    <p>Lorem ipsum dolor sit amet. Aliquam erat volutpat. Maecenas non tortor nulla, non malesuada velit.</p>
    <p>Aliquam erat volutpat. Maecenas non tortor nulla, non malesuada velit. Nullam felis tellus, tristique nec egestas in, luctus sed diam. Suspendisse potenti.</p>
</div>

<button id="btn-show-dialog">Ok</button>


<div class="overlay" id="dialog-container">
  <div class="popup">
    <p>This will be saved. Continue ?</p>
    <div class="text-right">
      <button class="dialog-btn btn-cancel" id="cancel">Cancel</button>
      <button class="dialog-btn btn-primary" id="confirm">Ok</button>
    </div>
  </div>
</div>