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<!DOCTYPE html> <html> <body> <img id="myImg" src="compman_lowres.gif" width="107" height="98"> <br><br> <button onclick="document.getElementById('myImg').src='compman.gif'">开启</button> <button onclick="document.getElementById('myImg').src='compman_lowres.gif'">关闭</button> </body> </html>