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Editorial Team
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Asked: 2026-05-31T19:59:59+00:00

I am coming from Java and try to learn Javascript right now. Doing that

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I am coming from Java and try to learn Javascript right now. Doing that I have a problem to understand some behaviour I wrote.

I like to have two windows. caller.html opens called.html and invokes a function called printMe().

This is my code for caller.html:

<html>
<head>
    <title> PDSA #4.1 : Page 1 - Communication between Windows </title>
</head>
<body>
    <script>
        fenster = open("called.html");
        fenster.printMe();
    </script>
</body>

and this is called.html:

<html>
<head>
    <title> PDSA #4.1 : Page 2 - Communication between Windows </title>
    <script>
        function printMe() {
            ausgabe = document.getElementById("toChange");
            ausgabe.innerHTML += "Changed!";
        }
    </script>
</head>
<body>
    <div id="toChange"></div>
</body>

Nothing happens when called.html is opened and from The Javascript Console in Chrome I can see the following error:

Uncaught TypeError: Object [object DOMWindow] has no method 'printMe'
(anonymous function)

Newbish as I am I don’t get it – why is printMe not found? The function is there and I see it in the code. Can you point me to the error?

Thanks in advance for any hints
André

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1 Answer

  1. Editorial Team

    if you use jquery, do it inside of, this would make your life easier..

    // on the second page
$(document).ready(function() {
  printMe();
});

    or maybe this would work:

    // on the first page
fenster = open("called.html");
$(fenster.document).ready(function(){
   fenster.printMe();
});

    if it’s not working, you can call setTimeout before calling the function to make sure the child window done loading

    // on the first page
fenster = open("called.html");
setTimeout(function(){
   fenster.printMe();
},2000);  // 2 seconds before invoking (increase if not enough)
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