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<!DOCTYPE html> <html> <body> <p>此示例演示如何将“onerror”事件分配给 img 元素。</p> <img src="image.gif" onerror="myFunction()"> <p id="demo"></p> <script> function myFunction() { document.getElementById("demo").innerHTML = "无法加载图像。"; } </script> </body> </html>