# getDFrameValues

## Principe

It can be useful, in certain particular cases, to get the mainPage and thisDFrame values before dFrameAPI starts the onLoadDFrame() function:

For instance the following code, in a page inserted in a DFrame shows a global variable of mainPage:

<HTML>

<BODY>

<script>

document.write(mainPage.value)

</script>

</BODY>

The problem is that, for Internet Explorer and Netscape 6, the mainPage and thisDFrame variables are not yet initialized in the Javascript environment of the page containing the code at the time they are needed. The preceding code will thus function correctly with Netscape 4 but you will have to include the following 'patch' for IE and NS6:

if (navigator.appName == "Microsoft Internet Explorer" ||_

(navigator.appName == "Netscape" && parseInt(navigator.appName) == 5))_

window.parent.getDFrameValues()

Happily there is a shortest way: It is to test if there is a parent window and if the getDFrameValues function exists in the parent window'. And, as for IE window.parent is set to self if none, this value is also tested:

if (window.parent && window.parent != self && window.parent.getDFrameValues) window.parent.getDFrameValues()

Example :

file: getDFrameValues.html

Run the example

See the source code