JQuery Click Event

JQuery Click Event

HTML

<img class="captcha" id="changeThis" src="https://www.nasa.gov/sites/default/files/styles/image_card_4x3_ratio/public/thumbnails/image/leisa_christmas_false_color.png?itok=Jxf0IlS4">

JavaScript

$(document).ready(function () {

        $("#changeThis").click(
            function () {
                changeImage();
            }            
        );
    });

function changeImage() {
var src = "https://www.nasa.gov/sites/default/files/styles/image_card_4x3_ratio/public/thumbnails/image/leisa_christmas_false_color.png?itok=Jxf0IlS4";
   var id = Math.floor((Math.random() * 1000) + 1);
          $('#changeThis').attr("src",src+'id='+id);
          id ='';
          alert("SOURCE : "+$('#changeThis').attr("src"));
          
}