onload/iframe/set-src-dom-1.html

<!DOCTYPE html>
<html>
<head>
<title>&lt;iframe>.onload Event Handler DOM Attribute and src='' DOM Attribute
Setting</title>
</head>
<body onunload="document.getElementsByTagName ('iframe')[0].onload = null">
  <p><iframe src="about:blank">noiframe</iframe></p>
  <p><button type="button" onclick="
    var result = document.getElementById ('result');
    result.innerHTML = 'not invoked yet';
    var iframe = document.getElementsByTagName ('iframe')[0];
    iframe.onload = function () {
      if (iframe.src == 'http://www.w3.org/') {
        result.innerHTML = 'invoked';
      } else {
        result.innerHTML = 'invoked but src != http://www.w3.org/';
      }
    };
    iframe.src = 'http://www.w3.org/';
  ">Click this button!</button></p>
  <p id="result">not executed yet</p>
</body>
</html>
1	<!DOCTYPE html>
2	<html>
3	<head>
4	<title><iframe>.onload Event Handler DOM Attribute and src='' DOM Attribute
5	Setting</title>
6	</head>
7	<body onunload="document.getElementsByTagName ('iframe')[0].onload = null">
8	<p><iframe src="about:blank">noiframe</iframe></p>
9	<p><button type="button" onclick="
10	var result = document.getElementById ('result');
11	result.innerHTML = 'not invoked yet';
12	var iframe = document.getElementsByTagName ('iframe')[0];
13	iframe.onload = function () {
14	if (iframe.src == 'http://www.w3.org/') {
15	result.innerHTML = 'invoked';
16	} else {
17	result.innerHTML = 'invoked but src != http://www.w3.org/';
18	}
19	};
20	iframe.src = 'http://www.w3.org/';
21	">Click this button!</button></p>
22	<p id="result">not executed yet</p>
23	</body>
24	</html>