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<html><body><h1>The Window Object</h1><h2>The frameElement Property</h2><p>Click the button.</p><p>If the window is in a frame, change its URL to "w3schools.com".</p><button onclick="myFunction()">Try it</button><script>function myFunction() { const frame = window.frameElement; if (frame) { frame.src = "https://www.w3schools.com/"; }}</script></body></html>