<div class="p-2">
<form onsubmit="return setAction(this)">
      <div>
        <label>Name:</label>
        <input id="name" name="name" type="text">
      </div>
      <div>
        <label>Email:</label>
        <input id="email" name="email" type="email">
      </div>
      <div>
        <input id="submit" type="submit">
      </div>
    </form>
    <hr>
    <form name="user_form">
      <div>
        <label>Email:</label>
        <input id="user_email" name="user_email" type="email">
      </div>
      <div>
        <label>Password:</label>
        <input id="user_password" name="user_password" type="password">
      </div>
      <div>
        <input id="login" type="submit" value="Login" onclick="return loginUser()">
      </div>
      <div>
        <input id="register" type="submit" value="Register" onclick="return registerUser()">
      </div>
    </form>
</div>
form label {
    display: inline-block;
    width: 100px;
    }
    form div {
    margin-bottom: 10px;
    }
function setAction(form) {
    form.action = "register.html";
    alert(form.action);
    return false;
    }
    function loginUser() {
    document.user_form.action = "login.html";
    alert(document.user_form.action);
    return false;
    }
    function registerUser() {
    document.user_form.action = "register.html";
    alert(document.user_form.action);
    return false;
    }

External CSS

  1. https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.1.3/css/bootstrap.min.css

External JavaScript

This Pen doesn't use any external JavaScript resources.