<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>ajax file</title> <script src="./js/jquery-1.12.4.min.js"></script> <script> $(function(){ // 设置禁止点击 $(".butt").attr("disabled","disabled") $(".ck").attr('readonly',"readonly") // 去除某个属性 $(".buu").removeAttr("disabled") }); </script> </head> <body> <div class="box" a=""> 嘿嘿 </div> <input class="ck" type="text" value="嘿嘿"> <button class='butt'>按钮</button> <button class='buu' disabled="disabled">按钮2</button> </body> </html>