<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<input type="checkbox" id="cid" onclick="selectAll()" />
<table>
<tr><td><input type="checkbox" name="ck" /></td><td>张三</td></tr>
<tr><td><input type="checkbox" name="ck" /></td><td>张a</td></tr>
<tr><td><input type="checkbox" name="ck" /></td><td>张b</td></tr>
<tr><td><input type="checkbox" name="ck" /></td><td>张c</td></tr>
<tr><td><input type="checkbox" name="ck" /></td><td>张d</td></tr>
</table>
<script type="text/javascript">
function selectAll(){
var cks=document.getElementsByName("ck");
var temp=document.getElementById("cid");
for(i=0;i<cks.length;i++){
if(temp.checked==true){
cks[i].checked=true;
}else{
cks[i].checked=false;
}
}
}
</script>
</body>
</html>