function CyclingJson1() {  var testJson = '[{ "name": "小強", "age": 16 },{"name":"小明","age":17}]';  testJson = eval("(" + testJson + ")");  for (var i = 0; i < testJson.length; i++) {   alert(testJson[i].name);  } } 

function CyclingJson2() { var testJson = '[{ "name": "小強", "age": 16 },{"name":"小明","age":17}]';  testJson = eval("(" + testJson + ")"); for (var i in testJson) {  alert(testJson[i].name); }}

function CyclingJson3() { var testJson = '[{ "name": "小強", "age": 16 },{"name":"小明","age":17}]'; testJson = eval("(" + testJson + ")"); $.each(testJson, function (i, n) {  alert(i); //i為索引值  alert(n.name); //n為遍歷的值 });}

<script language="javascript" type="text/javascript">var array = { "a": "abc", "b": [1, 2, 3, 4, 5, 6], "c": 3, "d": { "name": "james", "age": 28},"e":null,"f":true };var arrayObj = { "a": { "name": "kobe", "age": 34 }, "b": { "name": "lofo", "age": 28} };//遍歷array方式1for (var x in array) { if (typeof array[x] == 'object' && array[x] != null ) {  for (var y in array[x]) {   alert("key = " + y + " value = " + array[x][y]);  } } else {  alert("key = " + x + " value = " + array[x]); // 非array object }}//遍歷array方式2$.each(array, function(k, v) { var a = typeof (v); //數組與對象為object類型，其他分別是string與number類型 //此時的k代表a、b、c、d，v代表對應的值 if (typeof (v) == "object") {  //獲取數組與對象后，再去遍歷這個數組與對象  $.each(v, function(k1, v1) {   window.alert("key = " + k1 + " value=" + v1);  }); } else {  window.alert("key = " + k + " value=" + v); }});//遍歷arrayObj方式1for (var x in arrayObj) { for (var key in arrayObj[x]) {  window.alert("key=" + key + " value=" + arrayObj[x][key]); }}//遍歷arrayObj方式2$.each(arrayObj, function(key, value) { $.each(value, function(k, v) {  window.alert("key=" + k + " value=" + v); });});//遍歷arrayObj方式3$.each(arrayObj, function(key, value) { window.alert("key=" + key + " valueName=" + value.name + " valueAge=" + value.age);});</script><script language="javascript" type="text/javascript">var UserList = [ { "UserID": 11, "Name": { "FirstName": "Truly", "LastName": "Zhu" }, "Email": "" }, { "UserID": 12, "Name": { "FirstName": "Jeffrey", "LastName": "Richter" }, "Email": "" }, { "UserID": 13, "Name": { "FirstName": "Scott", "LastName": "Gu" }, "Email": "" }]$.each(UserList, function(k, v) { $.each(v, function(k1, v1) {  if (typeof (v1) == "object") {   $.each(v1, function(k2, v2) {    window.alert("key=" + k2 + " value=" + v2);   });  } else {   window.alert("key=" + k1 + " value=" + v1);  } });});</script><script language="javascript" type="text/javascript">var userArray = [ { "UserID": 11, "Name": { "FirstName": "Truly", "LastName": "Zhu" }, "Email": "" }, { "UserID": 12, "Name": { "FirstName": "Jeffrey", "LastName": "Richter" }, "Email": "" }, { "UserID": 13, "Name": { "FirstName": "Scott", "LastName": "Gu" }, "Email": "" }];for (var i in userArray) { for (var k in userArray[i]) {  if (typeof userArray[i][k] == "object" && userArray[i][k] != null) {   for (var j in userArray[i][k]) {    window.alert("key=" + j + "--value=" + userArray[i][k][j]);   }  } else {   window.alert("key=" + k + "--value=" + userArray[i][k]);  } }}</script>