Conditional Format Top/Bottom Rules

I have a column of 50 cells with various numbers and I, through the Top/Bottom Conditional Formating Rule, highlight the 10 highest numbers and the 10 lowest numbers.

How can I highlight the highs and lows while ignoring both "0" or blank cells?

Regards,
Gary

say your cells are A1 to A50 highlite your cells and conditional format
condition 1 "=and(A1<>0,A1<=small(if(A$1:A$50<>0,A$1:A$50),10))" and format your colour
condition 2 "=and(A1<>0,A1=large(if(A$1:A$50<>0,A$1:A$50),10))" and format your colour

your correct martindwilson --- thanks for the correction