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<!doctype html> <html> <head> <meta charset="utf-8"> <meta name="author" content="" /> <meta name="copyright" content="" /> <title></title> <style> *{ margin:0; padding:0; list-style:none; font-family: "微软雅黑","张海山锐线体简"} #div1{border-top:#333 10px solid;} </style> <script> window.onload=function(){ var oBtn=document.getElementById(‘btn1‘); var oBtn2=document.getElementById(‘btn2‘); var oBtn3=document.getElementById(‘btn3‘); var oDiv=document.getElementById(‘div1‘); var aIpt=oDiv.getElementsByTagName(‘input‘); //全选 oBtn.onclick=function(){ for(var i=0;i<aIpt.length;i++){ aIpt[i].checked=true; } }; //不选 oBtn2.onclick=function(){ for(var i=0;i<aIpt.length;i++){ aIpt[i].checked=false; } }; //反选 oBtn3.onclick=function(){ for(var i=0;i<aIpt.length;i++){ aIpt[i].checked=!aIpt[i].checked; } }; }; </script> </head> <body> <input type="button" value="全选" id="btn1"> <input type="button" value="不选" id="btn2"> <input type="button" value="反选" id="btn3"> <div id="div1"> <input type="checkbox" checked="true"><br> <input type="checkbox"><br> <input type="checkbox"><br> <input type="checkbox"><br> <input type="checkbox"><br> </div> </body> </html>
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原文地址：http://www.cnblogs.com/Xuman0927/p/5533640.html
