在HTML中，onmouseover 属性在鼠标指针移动到元素上时触发。
您可以尝试运行以下代码来实现onmouseover 属性−
<!DOCTYPE html>
<html>
<body>
<h3 id = "myid" onmouseover = "display()">
This is demo heading.
</h3>
<p>Keep the mouse cursor on the heading to change the color.</p>
<script>
function display() {
document.getElementById("myid").style.color = "red";
}
</script>
</body>
</html>
