<h1>強調照片的某個區塊</h1> <canvas id='mycan' /></canvas> <div> <button onclick='dic()'>資傳系地圖</button> <button onclick='i2511()'>地板教室</button/> <button onclick='i3501()'>3501教室</button/> <button onclick='i3502()'>3502教室</button/> </div>