<!DOCTYPE html> <html> <head> <title>全选</title> <style type="text/css"> .box{width: 120px; height: 250px; border: 1px solid #ccc; border-radius: 5px 10px; padding: 0px 10px; margin: 20px auto; } .box div{ border-bottom: 1px solid #ccc; padding-bottom: 10px; margin-bottom: 8px;} .box div input{margin: 8px;} </style> <script type="text/javascript"> function checkAll(){ var chackall,item; checkall=document.getElementById('checkall')//获取全选 item=document.getElementsByName('item[]') //获取勾选框 for (var i=0;i<item.length;i++){ if (checkall.checked){ item[i].checked=true //当选框被选中是,。勾选框选中 }else{ item[i].checked=false //反之 } } } </script> </head> <body> <div class="box"> <div> <input type="checkbox" id="checkall" onclick="checkAll()"><label for="checkall">全选</label> </div> <input type="checkbox" name="item[]">选项1<br> <input type="checkbox" name="item[]">选项2<br> <input type="checkbox" name="item[]">选项3<br> <input type="checkbox" name="item[]">选项4<br> <input type="checkbox" name="item[]">选项5<br> <input type="checkbox" name="item[]">选项6<br> <input type="checkbox" name="item[]">选项7<br> </div> </body> </html>