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<!DOCTYPE html>
<html>
<body>
<h1>HTML DOM Events</h1>
<h2>The onmousedown Event</h2>
<p>Use the HTML DOM to assign an "onmousedown" and "onmouseup" event to a p element.</p>
<p id="demo">Click me.</p>
<script>
document.getElementById("demo").onmousedown = function() {mouseDown()};
document.getElementById("demo").onmouseup = function() {mouseUp()};
function mouseDown() {
  document.getElementById("demo").innerHTML = "The mouse button is held down.";
}
function mouseUp() {
  document.getElementById("demo").innerHTML = "You released the mouse button.";
}
</script>
</body>
</html>