<script type="text/javascript">?//第一步把之前的數(shù)據(jù)寫成一個數(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<infos.length;i++)? ?{? ? ? if(infos[i][3]=="大一")? ? ? {? ? ? document.write("大一的學(xué)生如下:"+infor[i][3]+"<br />");? ? ??? ? ? }? ?}???//第二次篩選，找出都是女生的信息? for(var i=0;i<infos.length;i++)? {? ? ?if(infos[i].grade=="大一"&&infos[i].sex=="女")? ? ? {? ? ? ? ?document.write("大一女生:"+infos[i].name+"<br/>");? ? ? }?? ? ? ???}???</script>