# Code in mainPage: Access the container of a DFrame

Goal: To reach the variables and functions of a page inserted in a DFrame.

When a HTML page is inserted in a DFrame it is included in a 'container'.

This container will have a different nature according to the browser used: A window object for Internet Explorer and Netscape 6 and a layer for Netscape 4.

The access to the container itself offers only little interest. The access to the objects of the container, and particularly to the document object, as well as the variables and functions stored in the container, is on the other hand essential.

Way: Use 'window' keyword.

The access to the container is done by the keyword 'window':

var dFrame = new DFrame(parameters)

dFrame.setURL(url)

//call to the function ‘inlineFunction’ stored in the page defined by ‘url’:

dFrame.window.inlineFunction()

Caution: This code, such as, will not work, the page corresponding to ' url' being likely not completely loaded when the 'inlineFunction' function is called. The function onLoadDFrame allow circumventing this problem.

Example 1 :

In a page inserted in the DFrame dFrame :

function alertValue() {

alert('this is a message from the page of a dFrame')

}

In mainPage :

dFrame.window.alertValue()

return 'this is a message from the page of a dFrame'

Example 2 :

If the page inserted in the DFrame dFrame contains a form, the code in mainPage

for (var i in dFrame.window.document.forms[0]) alert(i)

will return all the elements of the form.

Example 3

The code defining the action of a Button uses the keyword 'thisDFrame' to reach the DFrame containing the Button and then the keyword 'window' to reach a function or elements of the page:

dFrame.addButton('text', 'thisDFrame.window.inlineFunction()')

or

dFrame.addButton('text',_

thisDFrame.window.document.forms[0].fieldName.value="Value"')