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<!DOCTYPE html> <html> <head> <style> #myDIV { width: 500px; height: 500px; background-color: lightblue; } </style> </head> <body> <p>单击“试一试”按钮在隐藏和显示 DIV 元素之间切换：</p> <button onclick="myFunction()">试一试</button> <div id="myDIV"> 这是我的 DIV 元素。 </div> <p>请注意，即使元素被隐藏，它仍保持其原始位置和大小。</p> <script> function myFunction() { var x = document.getElementById('myDIV'); if (x.style.visibility === 'hidden') { x.style.visibility = 'visible'; } else { x.style.visibility = 'hidden'; } } </script> </body> </html>