var infos=new Array();

?//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

?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"]];

for(var i=0;i<=9;i++){

? ? infos[i]=new Array();

? ? for(var j=0;j<=3;j++){

? ? ? ? infos[i][j]=new Array();

? ? ? ? if(infos[i][3]=="大一"){

? ? ? ? ? ? document.write(infos[i]+"<br>");

? ? ? ? }

? ? ? ? else

? ? } ??

}