在EXT JS脚本中这段代码是什么意思？

 <script language="JavaScript" type="text/javascript">
var ERP = (function() {
    var my = {};
    my.Path="<%=request.getContextPath()%>";
    my.IconPath="<%=request.getContextPath()%>/gbdf/js/ext4/images";
    return my;
}({}));
</script>