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Window Object     List of Categories

  1. How do I create a pop up or pop down window?

  2. What is the window object?

  3. How do I reference the window that opens a new window?

  4. How do I close the main window after it's opened a new window?

  5. How do I read or set the current window's size?







  1. How do I create a pop up or pop down window?

    See our pop up window generator.

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  2. What is the window object?

    A browser window. The window object is a top level client side object. There is nothing above the window object. Javascript is an object orientated language. That is, you start with an object and apply methods to it's properties or the properties of it's object groups. For example, the document object is an object of the window object. To change the document's background color, you'd set the document's bgcolor property.

    window.document.bgcolor = "red"

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  3. How do I reference the window that opens a new window?

    By using the opener property of the window object. A form in the main window can be referenced the same way. Eg.

    text = window.opener.document.formname.formfield.value

    where "formname" is the name you've given to your form using the name attribute and formfield is the name of the form field you're wanting to reference

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  4. How do I close the main window after it's opened a new window?

    window.opener.close()

    To change the opener's bgcolor :

    window.opener.document.bgcolor='red'

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  5. How do I read or set the current window's size?

    Netscape and IE use different properties for reading the size of a window. You set the size of a current window in Netscape by setting the innerHeight and innerWidth or outerHeight and outerWidth properties. Inner refers to the window's content area (where your HTML sits) and Outer refers to the windows borders (the size of the whole browser window).

    To read the values in Netscape :

    <script>
    oH = window.outerHeight;
    oW = window.outerWidth;
    alert("Height: " + oH + "px Width: " + oW + "px");
    </script>

    To set the current window's dimensions in Netscape

    <script>
    window.outerHeight = 500;
    window.outerWidth = 400;
    </script>

    You can place the script anywhere in you HTML document. The closer to the top, the quicker the script will be read and executed. Use the innerWidth and innerHeight to control the size of the content area.

    The method used to resize the Window in Internet Explorer is as such:

    <script>
    self.resizeTo(500,400);
    </script>

    where 500 is the width and 400 is the height. To read the size of the window's content area in Internet Explorer you must place this script after the <body> tag :

    <script>
    iW = document.body.clientWidth;
    iH = document.body.clientHeight;
    alert("Inner Width: " + iW + "px Inner Height:" + iH);
    </script>

    Internet Explorer also has executes the following methods

    self.resizeBy(x,y);
    self.moveTo(x, y);
    self.moveBy(x,y);

    where x and y are the absolute pixel positions. That is, you use numbers in place of x and y.

    Top of Page



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