Filtering through multiple combo boxes

Hello All,

I have two combo boxes having integer values...

Sample UI as follows

criteria box which has criteria's such as >, <, =, <=..            combobox#1 1to10  

criteria box which has criteria's such as >, <, =, <= ..          combobox #2 1to10       

grid with  a column which has values 1 to 10

Foe eg: I want to filter  > 5 and < 9

grid columns should display 6,7,8

Please advice 

I am able to filter thru one combo box using QueryFilter but please guide me about this advanced filtering 

Thanks in advance

Regards

Shankar Iyer