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I have problem calling a JavaScript function in an iframe from the parent page. Here is my two pages:
mainPage.html
<html>
<head>
<title>MainPage</title>
<script type="text/javascript">
function Reset()
{
if (document.all.resultFrame)
alert("resultFrame found");
else
alert("resultFrame NOT found");
if (typeof (document.all.resultFrame.Reset) == "function")
document.all.resultFrame.Reset();
else
alert("resultFrame.Reset NOT found");
}
</script>
</head>
<body>
MainPage<br>
<input type="button" onclick="Reset()" value="Reset"><br><br>
<iframe height="100" id="resultFrame" src="resultFrame.html"></iframe>
</body>
</html>
resultFrame.html
<html>
<head>
<title>ResultPage</title>
<script type="text/javascript">
function Reset()
{
alert("reset (in resultframe)");
}
</script>
</head>
<body>
ResultPage
</body>
</html>
(I know that document.all isn't recommended but this page should only be viewed with IE internally and I don't think that's the problem)
When I press the Reset-button I get "resultFrame found" and "resultFrame.Reset NOT found". It seems to have a reference to the frame but can't call the function on the frame, why is that?
Instead of getting the frame from the document, try getting the frame from the window object.
in the above example change this:
to
the problem is that the scope of the javascript inside the iframe is not exposed through the DOM element for the iframe. only window objects contain the javascript scoping information for the frames.
For even more robustness:
and
Call
If you can not use it directly and if you encounter this error: Blocked a frame with origin "http://www..com" from accessing a cross-origin frame. You can use postMessage() instead of using the function directly.
Use:
to access the Reset function in the iframe
document.getElementById("resultFrame")will get the iframe in your code, andcontentWindowwill get the window object in the iframe. Once you have the child window, you can refer to javascript in that context.Also see HERE in particular the answer from bobince.
When you access resultFrame through document.all it only pulls it as an HTML element, not a window frame. You get the same issue if you have a frame fire an event using a "this" self-reference.
Replace:
With:
Or: