สอบถามการส่งค่าใน javascript <button onclick="document.getElementById('id01').style.display='block'" class="w3-button w3-black">Open Tabbed Modal</button>

<div class="w3-container">
<h2>Modal Tabs</h2>
<p>In this example we add tabbed content inside the modal.</p>

<button onclick="document.getElementById('id01').style.display='block'" class="w3-button w3-black">Open Tabbed Modal</button>

<div id="id01" class="w3-modal">
 <div class="w3-modal-content w3-card-4 w3-animate-zoom">
  <header class="w3-container w3-blue"> 
   <span onclick="document.getElementById('id01').style.display='none'" class="w3-button w3-blue w3-xlarge w3-display-topright">&times;</span>
   <h2>Header</h2>
  </header>

  <div id="London" class="w3-container city">
   <h1>London</h1>
   <p>London is the most populous city in the United Kingdom, with a metropolitan area of over 9 million inhabitants.</p>
   <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p>
  </div>

  <div class="w3-container w3-light-grey w3-padding">
   <button class="w3-btn w3-right w3-white w3-border" onclick="document.getElementById('id01').style.display='none'">Close</button>
  </div>
 </div>
</div>
</div>