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JS & DOM Reference

Overview

JavaScript Objects

JS Array JS Boolean JS Date JS Math JS Number JS String JS RegExp JS Global

Browser Objects

Window Navigator Screen History Location

Core DOM Objects

DOM Node DOM NodeList DOM NamedNodeMap DOM Document DOM Element DOM Attr

HTML DOM Objects

DOM Document DOM Events DOM Elements
DOM Anchor DOM Area DOM Base DOM Body DOM Button DOM Form DOM Frame/IFrame DOM Frameset DOM Image DOM Input Button DOM Input Checkbox DOM Input File DOM Input Hidden DOM Input Password DOM Input Radio DOM Input Reset DOM Input Submit DOM Input Text DOM Link DOM Meta DOM Object DOM Option DOM Select DOM Style DOM Table DOM td / th DOM tr DOM Textarea

Window self Property

Window Object

Definition and Usage

The self property returns the current window.

Syntax

window.self

Browser Support

The self property is supported in all major browsers.

Example

When the "Check window" button is clicked, the function check() is called and the current window status is checked. If the topmost window (window.top) is different from the current window (window.self), then output that "This window is not the topmost window! Am I in a frame?". If the topmost window equals the current window, then fire the else statement:

<html>
<head>
<script>
function check()
{
if (window.top!=window.self)
{
document.write("<p>This window is not the topmost window! Am I in a frame?</p>")
}
else
{
document.write("<p>This window is the topmost window!</p>")
}
}
</script>
</head>
<body>
<input type="button" onclick="check()" value="Check window">
</body>
</html>

Try it yourself »

Window Object