Multiple Seartch paremeter

When ever you work on a search procedure with optional parameter,it will be helpful

Select col1,col2,.......coln from table_name where
(nullif(@col1,0) is null or(@col1>0 and col1 = @col1)
and (nullif(@col2,'') is null or col2=@col2)
and (nullif(@col3,'') is null or col3=@col3)