how to change image(img URL is everytime coming from the server) on button click in html

Question

I am new in client side scripting as well as stackoverflow. I want to change an image(Image URL is coming from the server everytime) of a div on click of a button or anchor. Here is My code for changing image.

$scope.captchaChange = function () {
    $http({
        method: "POST",
        url: 'http://localhost:8080/Project/captcha/captcha',
        headers: {
            'Content-Type': 'application/x-www-form-urlencoded'
        }
    }).success(function (response) {
        if (response.imgUrl.length > 0) {
            document.getElementById("captchaImg").src = response.imgUrl;
            document.getElementById("captchatext").value = response.imgToken;
        } else {
            alert('no captcha Image Avalable');
        }
    }).error(function (response) {
        //alert("response" + response)
        $scope.codeStatus = response || "Request failed";
        return false;
    });
}

Answer 1

Assuming you're trying to load a new image from the server and replace the current image in the div, you can do it like this:

 $('#img-change-btn').click(function() {
    var path = response.imgUrl // Or some path;
    $('#img-display-div img').attr('src', path)
                         .attr('alt', $('img', this).attr('title')); 
});

Here's working code: http://jsfiddle.net/yV6e6/6/

Note: I've used a bit of JQuery (.click, .empty,.append, etc), you can remove that and use only Javascript if you aren't using the JQuery Library.