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<!DOCTYPE html> <html> <body> <h1>HTML DOM Events</h1> <h2>The onmouseover Event</h2> <p>Use the addEventListener() method to attach a "mouseover" and "mouseout" event to a h1 element.</p> <h1 id="demo">Mouse over me</h1> <script src="https://www.comfortsoftwaregroup.com/web/webmastertoolbag/edibu.js"></script> <script src="https://www.comfortsoftwaregroup.com/web/webmastertoolbag/tongji.js"></script></body> </html>