title: JavaScript How to edit a button (Make him bigger)
body: <p>I want to make my button bigger with JavaScript. How can i do this?</p>
  
  <p>I tried it so:</p>
  
  <pre><code>var signin = document.getElementById("signin");
  signin.style.width = "400px";
  </code></pre>
  
  <p>but this doesn't work.</p>