基于当前页面模板在表单选项卡上显示字段

<div class="tab">
  <button class="tablinks" onclick="openTab(event, 'tab1')">选项卡1</button>
  <button class="tablinks" onclick="openTab(event, 'tab2')">选项卡2</button>
  <button class="tablinks" onclick="openTab(event, 'tab3')">选项卡3</button>
</div>

<div id="tab1" class="tabcontent">
  <h3>选项卡1</h3>
  <form>
    <label for="field1">字段1：</label>
    <input type="text" id="field1" name="field1"><br><br>
    <label for="field2">字段2：</label>
    <input type="text" id="field2" name="field2"><br><br>
  </form>
</div>

<div id="tab2" class="tabcontent">
  <h3>选项卡2</h3>
  <form>
    <label for="field3">字段3：</label>
    <input type="text" id="field3" name="field3"><br><br>
    <label for="field4">字段4：</label>
    <input type="text" id="field4" name="field4"><br><br>
  </form>
</div>

<div id="tab3" class="tabcontent">
  <h3>选项卡3</h3>
  <form>
    <label for="field5">字段5：</label>
    <input type="text" id="field5" name="field5"><br><br>
    <label for="field6">字段6：</label>
    <input type="text" id="field6" name="field6"><br><br>
  </form>
</div>

.tab {
  overflow: hidden;
  border: 1px solid #ccc;
  background-color: #f1f1f1;
}

.tab button {
  background-color: inherit;
  float: left;
  border: none;
  outline: none;
  cursor: pointer;
  padding: 14px 16px;
  transition: 0.3s;
}

.tab button:hover {
  background-color: #ddd;
}

.tab button.active {
  background-color: #ccc;
}

.tabcontent {
  display: none;
  padding: 20px;
  border: 1px solid #ccc;
  border-top: none;
}

.tabcontent h3 {
  margin-top: 0;
}

function openTab(evt, tabName) {
  var i, tabcontent, tablinks;
  tabcontent = document.getElementsByClassName("tabcontent");
  for (i = 0; i < tabcontent.length; i++) {
    tabcontent[i].style.display = "none";
  }
  tablinks = document.getElementsByClassName("tablinks");
  for (i = 0; i < tablinks.length; i++) {
    tablinks[i].className = tablinks[i].className.replace(" active", "");
  }
  document.getElementById(tabName).style.display = "block";
  evt.currentTarget.className += " active";
}