<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <h2>Create your snippet's HTML, CSS and Javascript in the editor tabs</h2> </div> <div> <input id="name" type="text" placeholder="Enter details" name="sname"/> <br> <input id="email" type="email" placeholder="Enter email" name="semail"/> <br> <button id="mybtn">Show Alert</button> <button onclick="myFunction()">Click me</button> </div> </div>

document.getElementById("mybtn").onClick = function() {myfun()}; function myfun(){ alert(Hello); } function myFunction(){ alert("hi"); }