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                            /JavaScript
                        
                        /JavaScript進(jìn)階篇

請(qǐng)問(wèn)一下我這是因?yàn)槭裁闯霾粊?lái)

?<!DOCTYPE??HTML>
<html?>
<head>
<meta?http-equiv="Content-Type"?content="textml;?charset=utf-8"?/>
<title>流程控制語(yǔ)句</title>
<script?type="text/javascript">
????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']
????];
?//第一步把之前的數(shù)據(jù)寫(xiě)成一個(gè)數(shù)組的形式,定義變量為?infos
?
??document.write("以下都是大一信息:<br/>");
????for(?i=0;i<infos.lenth;i++){
????????if(infos[i][3]=='大一'){
????????????document.write(infos[i]+"<br/>");
????????}
????}
?
?//第一次篩選，找出都是大一的信息
?
??document.write("以下都是女生信息:<br/>");
??for(?i=0;i<infos.lenth;i++){
????????if(infos[i][1]=='女'&&infos[i][3]=='大一'){
????????????document.write(infos[i]+"<br/>");
????????}
????}
?
??
?//第二次篩選，找出都是女生的信息
?
?
??
</script>
</head>
<body>
????
</body>
<ml>