on 1.2.3 , if you using "for(.. in...)",You will see something you do not wanted to see;
<script src="../js/jquery-easyui/jquery-1.4.4.min.js" type="text/javascript"></script>
<script src="../js/jquery-easyui/jquery.easyui.min.js" type="text/javascript"></script>
<script language="javascript">
function aaa() {
var a = ["a", "b", "c"];
for (var el in a) {
alert(a[el]);
}
}
</script>
</head>
<body onload="aaa()">
</body>