Limit levels and unordered list

Is there a way to limit how many levels are shown? Can the table of contents be converted to an unordered list?

The below css works, but I'm still wondering if there is another way to limit what gets pulled into the table of contents.
I'd also be interested in an unordered list option <ul>.
Thank you,

.table-of-contents-ck {
ol li ol li {display: none;}
}

Hi
you can use this css to remove the numbering:
you can do quite everything using CSS
CEd