hahahaha....anon bro, ke ho, you still there!!! you are right, i just wanted to confuse/harass lfc123, which i am sure she is still :P. your method is analytical and mine is mathematical which is actually derived from analytical method. so the result must be same. i will show it later on..too busy right now and too lazy to type in crazy characters for those boolena analysis. dun mind me! LooTe