each用法（网络摘抄）

$(function(){

/*
var arr1 = ["aaa","bbb","ccc"];

$.each(arr1,function(i,val){

alert(i);

alert(val);

});

*/

/*

var arr2 =[['a','aa','aaa'],['b','bb','bbb'],['c','cc','ccc']];

$.each(arr2,function(i,item){

alert(i);

alert(item);

});

*/

/*

var arr=[['a','aa','aaa'],['b','bb','bbb'],['c','cc','ccc']];

$.each(arr,function(i,item){

$.each(item,function(j,val){

alert(j);

alert(val);

});

});

*/

/*

var obj = {one:1,two:2,three:3};

$.each(obj,function(key,val){

alert(key);

alert(val);

});

*/

/*

$.each($("input:hidden"),function(i,val){

alert(i);

alert(val);

alert(val.name);

alert(val.value);

});

*/

$("input:hidden").each(function(i,val){

alert(i);

alert(val);

alert(val.name);

alert(val.value);

});

});

<input name="aaa" type="hidden" value="111" />
<input name="bbb" type="hidden" value="222" />
<input name="ccc" type="hidden" value="333" />
<input name="ddd" type="hidden" value="444"/>