哪错了 为什么输出不了呢？
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<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>流程控制语句</title>
<script type="text/javascript">
//第一步把之前的数据写成一个数组的形式,定义变量为 infos
var infos=[["小A","女",21,"大一"],
["小B","男",23,"大三"],
["小C","男",24,"大四"],
["小D","女",21,"大一"],
["小E","女",22,"大四"],
["小F","男",21,"大一"],
["小G","女",22,"大二"],
["小H","女",20,"大三"],
["小I","女",20,"大一"],
["小J","男",20,"大三"]];
//第一次筛选，找出都是大一的信息
for(var i=0;i<infos.length;++i){
if((infos[i][4]=="大一")&&(infos[i][2]=="女")){
document.write(infos[i]);
}
}
//第二次筛选，找出都是女生的信息
</script>
</head>
<body>
</body>
</html>
