Do you want to show default image if the image url doesn’t exist? Using jQuery it can be done. Please try the following code..
var img = $('img');
var default_url = "http://example.org/images/img.jpg";
var img_url = "http://example.org/images/" + some_variable + ".jpg";
img.error(function() {
$(this).attr('src', default_url)
});
img.attr('src', img_url);
