json获取元素数量

var keleyijson={"plug1":"myslider","plug2":"zonemenu"}

function JSONLength(obj) {
var size = 0, key;
for (key in obj) {
if (obj.hasOwnProperty(key)) size++;
}
return size;
};
document.write("json对象的元素个数是："+JSONLength(keleyijson));//结果为2

在获取一组json，看其返回结果

var keleyijson={

"model": [
{ "firstName": "Brett", "lastName":"McLaughlin", "email": "aaaa" },

{ "firstName": "Jason", "lastName":"Hunter", "email": "bbbb" }
],

"girl": [
{ "firstName": "Brett", "lastName":"McLaughlin", "email": "aaaa" },

{ "firstName": "Jason", "lastName":"Hunter", "email": "bbbb" }
],

"zachary": [
{ "firstName": "Brett", "lastName":"McLaughlin", "email": "aaaa" },

{ "firstName": "Jason", "lastName":"Hunter", "email": "bbbb" }
],

"lite": [
{ "firstName": "Brett", "lastName":"McLaughlin", "email": "aaaa" },

{ "firstName": "Jason", "lastName":"Hunter", "email": "bbbb" }
]

}

function JSONLength(obj) {
var size = 0, key;
for (key in obj) {
if (obj.hasOwnProperty(key)) size++;
}
return size;
};
document.write("json对象的元素个数是："+JSONLength(keleyijson));