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length property (window)

Browser support:

Returns the number of frames (frame or iframe) in the current window.

The frame elements can be accessed through the frames collection.

Syntax:

object.length;

You can find the related objects in the Supported by objects section below.

This property is read/write.

Possible values:

Integer that represents the number of frames.

Default: this property has no default value.

Example HTML code 1:

This example illustrates the use of the length property:

<head>
    <script type="text/javascript">
        function GetNrOfFrames () {
            alert (window.length);
        }
    </script>
</head>
<body>
    <iframe></iframe>
    <button onclick="GetNrOfFrames ()">Get the number of frames in the window!</button>
</body>