<html>
<head>
</head>
<body>
<script type="text/javascript">
document.write("<ul>");
for(var i=0; i<20; i++){
document.write("<li>");
document.write(‘<input type="checkbox" name="ids[]" value="‘+i+‘">aaaaaaaaa‘);
document.write("</li>");
}
document.write("</ul>");
</script>
<label for="cc"><input id="cc" type="checkbox" onclick="sall(this)">全选</label>
<script>
var cnames=document.getElementsByName("ids[]");
function sall(obj){
for(var i=0; i<cnames.length; i++){
cnames[i].checked=obj.checked;
}
}
</script>
</body>
</html>
原文：http://www.cnblogs.com/yzdxchenhui/p/4965871.html