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<!DOCTYPE html> <html> <body> <h1>HTML DOM Events</h1> <h2>The beforeprint Event</h2> <p>Use the HTML DOM to assign an "onbeforeprint" event to a body element.</p> <h3>Print this document!</h3> <p><b>Tip</b>: The keyboard shortcut Ctrl+P prints a page.</p> <script> document.getElementsByTagName("body")[0].onbeforeprint = function() {myFunction()}; function myFunction() { alert("You are about to print this document!"); } </script> </body> </html>
