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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>本教程(w3big.com)</title> <script> function show_coords(event){ var x=event.clientX; var y=event.clientY; alert("X coords: " + x + ", Y coords: " + y); } </script> </head> <body> <p onmousedown="show_coords(event)">请在文档中点击。一个消息框会提示出鼠标指针的 x 和 y 坐标。</p> </body> </html>