求助数组的问题

源自：4-10 编程练习

<!DOCTYPE HTML>

<html >

<head>

<title>流程控制语句</title>

var infos=new Array;

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"]

]

//第一步把之前的数据写成一个数组的形式,定义变量为 infos

for(i=0;i<infos.length;i++)

{if(infos[i][3])=="大一"&&infos[i][1]=="女"){

document.write(infos[i][0])

}}

//第一次筛选，找出都是大一的信息

//第二次筛选，找出都是女生的信息

</script>

</head>

<body>

</body>

</html>

没有输出名字啊

提问者：qq_不像白羊座的白羊座_0 2015-10-26 10:55