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<!DOCTYPE html> <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>