使用--onerror事件
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<img src="./11212121212.png" onerror="nofind();" />
</body>
<script type="text/javascript">
function nofind() {
var img = event.srcElement;
img.src = "./America1.jpg";
img.onerror = null;
}
//没有找到时 用事件获取 一个一个获取
</script>
</html>