Then again you could just choose ==>View ==>Source. Or in Opera you could just press CTRL F3.
Sometimes this doesn't work for me.
What we are discussing is done thus:
SELECT an area you wish to study/use with mouse LeftButton
Place cursor somewhere in this selected area
Press right mouse button to pull up menu
You may get lucky and find your cursor was such to give you VIEW SOURCE as an option: if so press it and there is your code.
If not, then you need to place your cursor somewhere else in the selected area and try again.
Loop until successful!