div with fixed position not scrolling along page

I am having a fixed div i.e. position attribute has value fixed in my css file and that does what it is supposed to do but that doesn't scroll while the rest of the page scrolling
Is there a way that I can get the div to scroll when it gets full separately from the rest of the page? I am waiting for anyone's help

put this code into your div styling and check it out
overflow: auto;

You can also use overflow: scroll;