当鼠标指针移到HTML中的元素上时执行脚本？
的onmouseover 属性触发器时在HTML中的元素的鼠标指针移动。
示例
您可以尝试运行以下代码以实现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>