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<!DOCTYPE html> <html> <body> <p>在下面的列表中选择一个位置来更改 div 的位置。</p> <div id="myDiv" style="top:50px;left:100px;">我是一个 DIV 元素.</div> <select onchange="myFunction(this);" size="5"> <option>absolute <option>fixed <option>static <option>relative <option>sticky </select> <script> function myFunction(x) { var whichSelected = x.selectedIndex; var posVal = x.options[whichSelected].text; var elem = document.getElementById("myDiv"); elem.style.position = posVal; } </script> </body> </html>