<html><body><img onmouseenter="bigImg(this)" onmouseleave="normalImg(this)" border="0" src="smiley.gif" alt="笑脸" width="32" height="32"><p>当用户将鼠标指针移到图像上时，将触发函数 bigImg()。</p><p>当鼠标指针移出图像时，函数 normalImg() 被触发。</p><script>function bigImg(x) { x.style.height = "64px"; x.style.width = "64px";}function normalImg(x) { x.style.height = "32px"; x.style.width = "32px";}</script></body></html>