源代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>编程字典</title> </head> <body> <p>如果浏览器找不到图片，则显示alt文本:</p> <img src="wrongname.gif" alt="HTML5 Icon" style="width:128px;height:128px;"> </body> </html>
运行结果