<button onclick="myFunction()">Click me</button> <p id="demo"></p> <script> function myFunction() { document.getElementById("demo").innerHTML = "Hello World"; } </script>
<script> function myFunction() { alert("ALERT"); } </script> <button onclick="myFunction">Click</button>
<script> $(document).ready(function(){ $('#MyButton').click(function(){ CapacityChart(); }); }); </script> <input type="button" value="Capacity Chart" id="MyButton" >