low pass filter with windowing method

hi everyone,
im doing an assignment about developing an adaptive notch filter for the removal of 50hz noise from an ecg signal..im really not familiar with matlab but im learning..after i read about filters i decided to use low pass filter with windowing method..now ive tried tis low pass filter
fsamp = 60;
fcuts = [5 10];
mags = [1 0];
devs = [0.05 0.01];
[n,Wn,beta,ftype] = kaiserord(fcuts,mags,devs,fsamp);
hh = fir1(n,Wn,ftype,kaiser(n+1,beta),'noscale')
after that i really dont know how to continue the development..please guide me.
awaiting for ur reply
dolly