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<html><body><h1>The Document Object</h1><h2>The open() Method</h2><p>Open a document deletes existing content.</p><p>Open this document and write some text to it:</p><button onclick="myFunction()">Try it</button><script>function myFunction() { document.open(); document.write("<h1>Hello World</h1>"); document.close();}</script></body></html>