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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>饭桶教程(kuaikuaixuan.com)</title> <script> function isKeyPressed(event){ if (event.shiftKey==1){ alert(" shift 键被按下!"); } else{ alert(" shift 键没被按下!"); } } </script> </head> <body onmousedown="isKeyPressed(event)"> <p>点击该段落，弹窗会提示是否按下 shift 键。</p> </body> </html>
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