<!DOCTYPE html>
<html>
<head>
<script src="/lib/jquery-1.12.2.min.js"></script>
<script>
$(document).ready(function(){
$("img").error(function(){
$("img").replaceWith("<p>Error loading image!</p>");
});
});
</script>
</head>
<body>
<img src="errorimg.gif">
<p>If the image above encounters an error, it will be replaced with a specified text.</p>
</body>
</html>