<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<link href="sysStyle.css" type="text/css" rel="stylesheet"/>
<link href="../crm-css/search.css" type="text/css" rel="stylesheet"/>
<script src="jquery-1.7.2.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function() {
$(‘input[type=checkbox]‘).click(function() {
$("input[name=‘apk[]‘]").attr(‘disabled‘, true);
if ($("input[name=‘apk[]‘]:checked").length >= 3) {
$("input[name=‘apk[]‘]:checked").attr(‘disabled‘, false);
alert("选中超过三个");
} else {
$("input[name=‘apk[]‘]").attr(‘disabled‘, false);
}
});
})
</script>
<ul>
<li>
<input type="checkbox" name="apk[]" value=1 />
APK1
</li>
<li>
<input type="checkbox" name="apk[]" value=2 />
APK2
</li>
<li>
<input type="checkbox" name="apk[]" value=1 />
APK3
</li>
<li>
<input type="checkbox" name="apk[]" value=4 />
APK4
</li>
<li>
<input type="checkbox" name="apk[]" value=6 />
APK5
</li>
<li>
<input type="checkbox" name="apk[]" value=7 />
APK6
</li>
<li>
<input type="checkbox" name="apk[]" value=8 />
APK7
</li>
</ul>
原文：http://www.cnblogs.com/yy123/p/4011685.html