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<!DOCTYPE html> <html> <body> <ul id="myList1"><li>咖啡</li><li>茶</li></ul> <ul id="myList2"><li>水</li><li>牛奶</li></ul> <p>单击按钮将项目从一个列表移动到另一个列表</p> <button onclick="myFunction()">试一试</button> <script> function myFunction() { var node = document.getElementById("myList2").lastChild; var list = document.getElementById("myList1"); list.insertBefore(node, list.childNodes[0]); } </script> </body> </html>