Validate columns then row

Validate columns then row

Hi Masters,

Would like some help here. 
How do check by column then row? Now the jquery just check 1st column, if I select value at drop down and type at text box at column 2 or 3 still the alert box pop out. 
And how to check if user type at text but no value selected at drop down will alert user?

http://jsfiddle.net/3YSyG/

Thanks,
Joseph