<!DOCTYPE html>
<html>
<head>
<title>test page</title>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
</head>
<body>
<input type="checkbox" name="sports[]" value="0">足球
<input type="checkbox" name="sports[]" value="10">篮球
<input type="checkbox" name="sports[]" value="20">排球
<input type="checkbox" name="sports[]" value="30">乒乓球
<input type="checkbox" name="sports[]" value="40">羽毛球
<input type="checkbox" name="sports[]" value="50">橄榄球
<input type="checkbox" name="sports[]" value="60">冰球
<input type="checkbox" name="sports[]" value="70">曲棍球
<input type="checkbox" name="sports[]" value="80">同求
<input type="checkbox" id="chkAll" onclick="chkAll(this)">全选
<script type="text/javascript">
var objs = document.getElementsByName('sports[]');
function chkAll(obj){
for (var i = objs.length - 1; i >= 0; i--) {
objs[i].checked = obj.checked;
};
}
</script>
</body>
</html>