i'm trying to make something like this:
<http://jsfiddle.net/WFXun/>

but instead of fadeout checkboxes on click, i want to mark checked only the checkboxes defined by ids (var ids = [2,3,5,6];) when the page is loaded.

I was trying this and it does not work:

```
$("#set_1").load(function(){
     var ids = [2,3,5,6];
        for(i=0;i<ids.length;i++){
            $("#set_"+ids[i]).prop("checked", true);
    }
})

```