on scroll overlap on top of div in html - slide

How to implement design in html where there will be image div and content div on scroll the content div should overlap the image diventer image description here
On scroll the content div should be on the top of image div it should overlap with high z-index

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How to hook into positioning top bar fixed menu?

I have transparent top bar. On header links text is white on blue background. But content has white background. I would like to change top bar text color, when menu is on content area.
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Android Layout xml - eclipse

sorry for my question, but I'm android beginner :-)
I need help just with create layout, some best practices for my solution.
My requested layout must be on the screen splitted to 3 parts:
header as expander - if possible
fix size (height 200px / width fill) of the screen - if expanded
linear layout - horizontal with 3 rows of labels
only first label is visible if expander is collapsed
top of screen
body
dynamically resize (height fill place between header and footer / width fill)
scrollable vertical
horizontal will change body with another (not necessary now)
in body will be two level list - headers as parent, expandable to child
List item
fix size (height 200px / width fill) of the screen
linear layout - vertical (with 4 images icons)
bottom of screen
My basic problem is how create basic layout (header / body / footer) as panels in whitch I can add next controls.
Create it as linear layout?? How correct fix it on the screen? What header as expander?

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I did it by setting the height manually.
I estimated that each accordion item is 37 pixel. And I am adding 100 to leave space for the text inside the accordion items.
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I have a grid in ExtJS and a div that I place or toggle to the left of it. This div is not managed by ExtJS.
When I show this div, the grid slips to the right and this div shows up on its left.
The problem I have is that when I hide the div, the grid squeezes and looses the full width it had based on the "fit" layout meaning there is some empty space left on the right of it now.
Now, as soon as I resize the window, it catches the event and resizes itself but not before it.
Anyone with any suggestions I could try in order to maintain the grid's stretch, your help is much appreciated.
Try explicitly calling doLayout() on the grid or the grid's parent, when the div is hidden.

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