<script> window.onload=function(){ var CheckAll=document.getElementById(\'All\'); var UnCheck=document.getElementById(\'uncheck\'); var OtherCheck=document.getElementById(\'othercheck\'); var div=document.getElementById(\'div\'); var CheckBox=div.getElementsByTagName(\'input\'); CheckAll.onclick=function(){ for(i=0;i<CheckBox.length;i++){ CheckBox[i].checked=true; }; }; UnCheck.onclick=function(){ for(i=0;i<CheckBox.length;i++){ CheckBox[i].checked=false; }; }; othercheck.onclick=function(){ for(i=0;i<CheckBox.length;i++){ if(CheckBox[i].checked==true){ CheckBox[i].checked=false; } else{ CheckBox[i].checked=true } }; }; }; </script> </head> <body> 全选：<input type="button" id="All" value="全选" /><br /> 不选<input type="button" id="uncheck" value="不选" /><br /> 反选<input type="button" id="othercheck" value="反选" /><br /> <div id="div"> <input type="checkbox" />ZEALER<br /> <input type="checkbox" />BLOG<br /> <input type="checkbox" />MOOC<br /> </div> </body>