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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.gif"> <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> </html>