Can Jquery Detect How Many Lines of Text within a Div or A tag?

Can Jquery Detect How Many Lines of Text within a Div or A tag?

Can Jquery Detect How Many Lines of Text within a Div or A tag?

I am attempting to have different backgrounds depending on how many lines the left navigation takes up. For example if the item in the left nav only takes up one line it will have backgroundA. If the item in the left nav only takes up 2 lines it will have backgroundB etc.. Currently I have everything with backgroundA but there are a few that are taking up two lines or three lines and I can't shorten them as that is what the customer needs to have, but it looks horrible...

So can Jquery detect how many lines of text within a div or a tag and follow the css so it knows when it goes to another line and it can switch the background to something longer?