<script?type="text/javascript">

?//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
????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"]]
?
?//第一次篩選，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]+"<br/>")
????????
????}
}?
??
?//第二次篩選，找出都是女生的信息
?for(var?n=0?n<infos.length;n++){
?????if(infos[n][3]=="大一"&&infos[n][1]=="女"){
?????????document.write(infos[i][0]+"<br/>")
?????}
?}
?
??
</script>