<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta http-equiv="Content-Type" content="text/html; charset=gbk" />
<title>test</title>
</head>
<script type="text/javascript" src="jquery.js?2015"></script> <!--不能用<script src="jquery.js"/>，必须<script></script> -->
<script type="text/javascript" language="javascript">
$(document).ready(function(){
$("#selectAllorNone").click(function(){
//alert('run');
$("#checkList :checkbox").each(function(){
//alert('run');
$(this).attr("checked",!$(this).attr("checked"));
});
});
});
</script>
<body>
<div id="checkList">
<input type="checkbox">心</input>
<input type="checkbox">想</input>
<input type="checkbox">事</input>
<input type="checkbox">成</input>
</div>
<input type="button" value="全选/全不选" id="selectAllorNone">
<input>
</body>
</html>