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<html><style>.mystyle { background-color: coral; padding: 16px;}</style><body><h1>The Element Object</h1><h2>The className Property</h2><div id="myDIV"><p>I am myDIV.</p></div><p>Click the button to set a class for myDIV:</p><button onclick="myFunction()">Try it</button><script>function myFunction() { document.getElementById("myDIV").className = "mystyle";}</script></body></html>