可以的。

<style>
.modal {
  display: none;
  position: fixed;
  z-index: 1;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.4);
}
.modal-content {
  background-color: #fefefe;
  margin: 15% auto;
  padding: 20px;
  border: 1px solid #888;
  width: 80%;
}
.close {
  color: #aaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
}
.close:hover {
  color: black;
  cursor: pointer;
}
</style>

<a href="#" id="myLink">点击弹出模态框</a>

<div id="myModal" class="modal">
  <div class="modal-content">
    <span class="close">&times;</span>
    <p>这里是弹窗内容...</p>
  </div>
</div>

<script>
var modal = document.getElementById("myModal");
var link = document.getElementById("myLink");
var span = document.getElementsByClassName("close")[0];

link.onclick = function() {
  modal.style.display = "block";
}

span.onclick = function() {
  modal.style.display = "none";
}

window.onclick = function(event) {
  if (event.target == modal) {
    modal.style.display = "none";
  }
}
</script>