Answers for "document click a button"

document on click

$(document).on("click","#test-element",function() {
    alert("click");
});

button click function in js

<script>
  $(document).ready(function(){
    $('#MyButton').click(function(){
       CapacityChart();
    });
  });
</script>

<input type="button" value="Capacity Chart" id="MyButton" >