Question: Please can any one help me.
When I resize the browser then the collapse dropdown's backpart are shown what I dont want(problem 1.png).
 I want that when I will resize the browser the dropdown and it backpart will be hidden accroding to the header of dropdown. 

when on hover, list item are not showing , i want to show images also on hover state.( problem 2png )

problem live link:
![enter image description here][1]<http://tb.taslimk.tk/>

Another problem:)

Answer: 
An arithmetic shift right does a divide by 2 that rounds towards minus infinity.
> 
> We know that when we shift a binary number to the right, it is divided by 2
> 
> 
> 

This is where the confusion starts!  

`shl shr sal sar` are just shifts - nothing more. If some kind of shift resembles a division by 2 it's more or less a bonus. We can not call this behaviour right or wrong.