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<!DOCTYPE html>
<html>
<body>
<p>This example uses the HTML DOM to assign an "onerror" event to an img element.</p>
<img id="myImg" src="image.html">
<p id="demo"></p>
<script>
document.getElementById("myImg").onerror = function() {myFunction()};
function myFunction() {
  document.getElementById("demo").innerHTML = "The image could not be loaded.";
}
</script>
</body>
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</html>