I want to personalize the datepicker from jQuery. i want to add `z-index:2`.

```
$(function(){
    $("#datepicker" ).datepicker({ dateFormat: "yy-mm-dd" });
    $("#datepicker").css("z-index",2);
});

```

I know that the line "`$("#datepicker").css("z-index",2);`" doesn't affect datepicker, but I want smth like this. How can I do that ? Thx in advance