Show header when scrolled up enough part of page and with a specific speed

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I was trying to do something in jquery like:

1. 
   

   Hide the header when user scrolls down

   
   


2. 
   

   When user scrolls up a little, don't show the header

   
   


3. 
   

   When user scrolls up a bit more, but, with a slow speed which means the user might be reading the content, still don't show the header

   
   


4. 
   

   When user scrolls up enough and with a faster speed, which means the user might want to go to top, or, want to access the navigation, SHOW THE HEADER and go to top link.

   
   

I have searched a lot, but could not find anything like this. I have tried the following:

http://ift.tt/1bm4zw2

Thanks

asked 1 min ago

user3721221

1

Show header when scrolled up enough part of page and with a specific speed