can I create a mouseover in excel
 

I have a spreadsheet that tracks accruals and payments over 12 months.
Can I "mouseover" an accrual and have it highlight along with the
corresponding payment. For example, I accrue $150 in liability one month,
and it is not paid until two months later. If I mouseover either of those
numbers, any positive or negative amount would be highlighted. This would
show me what has been accrued and paid, or what has been paid and still needs
to be accrued.

thanks