JS数据问题！！！！！

var arrData = [{
"picture" : "2_2_content/css/myImg/picture1.png",
}, {
"picture" : "2_2_content/css/myImg/picture2.png",
}, {
"picture" : "2_2_content/css/myImg/picture3.png",
}, {
"picture" : "2_2_content/css/myImg/picture4.png",
}, {
"picture" : "2_2_content/css/myImg/picture5.png",
}, {
"picture" : "2_2_content/css/myImg/picture6.png",
}, {
"picture" : "2_2_content/css/myImg/picture7.png",
}, {
"picture" : "2_2_content/css/myImg/picture8.png",
}, {
"picture" : "2_2_content/css/myImg/picture9.png",
}, {
"picture" : "2_2_content/css/myImg/picture10.png",
}, {
"picture" : "2_2_content/css/myImg/picture11.png",
}];

                    如何给这个arrData继续添加picture数据？？？
                    例如这个如何添加进去：
                    {
            "picture" : "2_2_content/css/myImg/picture12.png",
        }

 arrData.push({
            "picture" : "2_2_content/css/myImg/picture12.png",
        });

arrData.push(obj)
是给var出的数组加元素的方法，
arrData.push({
"picture" : "2_2_content/css/myImg/picture12.png",
});

arrData.push({
"picture" : "xxx",
});

arrData.push({
"picture" : "...",
});