初学者提问：为什么alert出的结果是[object]，希望达人解答下~谢了

菜鸟提问：为什么alert出的结果是[object]，希望达人解答下~谢了~

JScript code

<script type="text/javascript">        var data = { "s1.jpg": ["1.jpg", "Lili", "168", "nurse"], "s2.jpg": ["2.jpg", "Smith", "170", "Teacher"] };        function showSmallDiv() {            var imgDiv = document.getElementById("imgDiv");            for (var itme in data) {                                alert(item);            }        }    </script>

JScript code

        var data = { "s1.jpg": ["1.jpg", "Lili", "168", "nurse"], "s2.jpg": ["2.jpg", "Smith", "170", "Teacher"] };                             for (var item in data) {                                alert(item);            }