jquery怎么遍历数组

var arr=new Array();

arr=["aaa","bbb","ccc"];

$.each(arr,function(index,value){

     alert(i+"..."+value);

});

$(function () {

    $.each([["aaa", "bbb", "ccc"], ["ddd", "eee", "fff"], ["ggg", "hhh", "iii"]], function (index, item) {

         alert(index + "..." + item);

         //输出0...aaa,bbb,ccc  1...ddd,eee,fff  2...ggg,hhh,iii   这时的index为数组下标,item相当于取这二维数组中的每一个数组

         $.each(item, function (index, itemobj) {

              alert(index + "....." + itemobj);

         });

    });

     //输出0...aaa,bbb,ccc  0...aaa 1...bbb 2...cccc  1...ddd,eee,fff  0...ddd 1...eee 2...fff  2...ggg,hhh,iii 0...ggg 1...hhh 2...iii

 });