<!DOCTYPE HTML>
<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=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"] ]; //第一次筛选,找出都是大一的信息
for(var i=0;i<9;i++){
if(infos[i][3]==="大一"){
document.write(infos[i][0]); } } //第二次筛选,找出都是女生的信息
for(var i=0;i<9;i++){
if(infos[i][1]==="女"){
document.write(infos[i][0]); } }
</script>
</head>
<body>
</body>
</html>