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複製代碼 代碼如下:
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>iframe的onload在Chrome/Opera中執行兩次</title>
</head>
<body>
<script>
var ifr = document.createElement('iframe');
ifr.onload = function(){alert(1);};
document.body.insertBefore(ifr,document.body.childNodes[0]);
ifr.src = 'http://www.baidu.com';
</script>
</body>
</html>
解決方案很簡單，改下代碼順序即可：建立iframe， 添加到body中，最後添加load事件。所有瀏覽器下將表現一致。
複製代碼 代碼如下:
var ifr = document.createElement('iframe');
document.body.insertBefore(ifr,document.body.childNodes[0]);
ifr.src = 'http://www.baidu.com';
ifr.onload = function(){alert(1);};
此外用Safari5測試，沒有alert，一直在載入中，能持續30s以上。大家試試看呢？
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