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Leave space at the top of every printed page

So, I have a header that needs to appear at the top of every page when the user prints this website. I'm setting position to fixed to get it to appear at the top of every page, but the problem is that the header is now overlapping some of the content near the top. The header is a static size, so if I could just put a margin X number of pixels at the top of every page that would solve my problem, but I can't find a way to do that. Thanks.
Example code:
HTML
<header>This should be at the top of every printed page</header>
<section id="content">*Multiple pages of text*</section>
CSS
header {
position:fixed;
top:-10;
height:20px;
}
#content {
left:0px;
overflow:visible;
position:relative;
/*top:52px;*/
width:98%;
}
The "top:52px" worked to get the content to avoid the header, but it was also causing some lines of text to be cut off in the middle by a page break, which is why it's commented out.
New info:
Something interesting I discovered about the "top:52px" line: it's not actually moving the content down 52 pixels, it's somehow hiding the top 52px of content on every page. I noticed this when I set header display to none and noticed significant portions of my content still missing.
Note: I'm open to javascript or jquery solutions if one exists.

Finally figured this out:
#content {
position:relative;
display:table;
table-layout:fixed;
padding-top:20px;
padding-bottom:20px;
width: 94%;
height:auto;
}
This puts padding at the top and bottom of every page, does not cut any content off from the top or bottom, and allows #content to respect width adjustments so that content doesn't get cut off on the right side of the page.

Lots of different ways to do this, one quick way would be to just use a div tag and set the margin-top to however many pixels you want:
<div style="margin-top:20px"></div>

simply add to #content:
#content {
margin-top: 50px; // however many pixels you need
}

I think you should read about CSS #media print and #page rule margin property here.

In my case, I only added a padding-top: XXpx and that was it. The css worked fine in all pages

CSS overlay coming from corners

I am trying to bring in a overlay that comes on the top of a image when you hover with your mouse. Currently I have it coming just from the top, and eases down to the bottom. What I am trying to achieve though, is have the overlay split into 2 sections, coming from the top left and bottom right and join in the middle. I know this is hard to understand with just text, so I created an image.
I have seen this done before, but am not sure what it is called, or how to achieve the effect. Help would be appreciated

Here's my stab at it: http://jsfiddle.net/
The basic idea is that you're just doing this, but with the wrapper element rotated. This solution would obviously need to checked for compatibility.
This could be achieved without a .slide element, but would require more manual positioning of the elements.

Here is a basic example using jquery.
Note, the cool kids would do this with css3.
http://jsbin.com/eyilog/1/edit
In this example the divs are absolutely positioned outside the containing element. overflow:hidden; makes sure they are invisible. On hover jquery animates their positions back inside the div, overlaying the content of the div.
To make it diagonal just use transparent images.
$(".text").hover(function() {
$(".topleft").animate({top: "+0px"}, 500);
$(".bottomright").animate({bottom: "+0px"}, 500);
});
<div class="text">
<div class="topleft"></div>
text
<div class="bottomright"></div>
</div>
.text {
background-color:red;
width:100px;
height:100px;
margin:auto;
overflow:hidden;
position:relative;
}
div div {
background-color:black;
height:50px;
width:100px;
position:absolute;
}
.topleft {
top:-50px;
}
.bottomright {
bottom:-50px;
}

Issue with a js slider trying to make the current slides' div appear on top

For a js slider we're using a span "slider_link" to make the entire containing div into a clickable link. The issue is the first div seems to stay in place so the link never changes even when the slides do. We want the link for each slide to appear with that slide.
Demo of issue
HTML excerpt:
<div class="slider1">
<div class="slider-text slider-text1">
<span class="slider_link"></span>
<h1><span>Differentiate.</span> Shouldn't your recruitment firm stand out as much as you do.</h1>
<p>Human Resourcefulness is finding the right people, right now.</p>
</div>
</div>
CSS excerpt:
.slider_link {
float:left;
position:absolute;
width:100%;
height:100%;
top:0;
left: 0;
/* edit: added z-index */
z-index:inherit;
/* edit: fixes overlap error in IE7/8,
make sure you have an empty gif */
background-image: url('../images/empty.gif');
}

Put relative positioning in the wrapper div!

How to create a table-like CSS layout with DIVs?

UPDATE 2
I found a tentative solution that currently works for me in Chrome on Mac OS X. You can check out my answer below for details. For those of you who are still trying to come up with CSS only solutions or JavaScript solutions, please keep going and let me know what you come up with! Please :)
UPDATE
The answer below is really close to an all CSS solution, so I'm going to try to make it work. In the meantime, I'm opening up this question to JavaScript solutions as well. How would you do it using JavaScript? All solutions are now welcome :)
Let's see if we can solve this one together!
I'm trying to set up a layout, check out the image...
I'm using the "sticky footer" technique, which works great, and I've set it up so that whenever one of the two columns gets taller, the other will also match its height, as described in this article. The problem, however, is that these two columns don't reach the footer naturally... I'm forcing the height through JavaScript.
Anyway, all the relevant code can be seen in the fiddle...
CODE
http://jsfiddle.net/UnsungHero97/XrJMa/embedded/result/
QUESTIONS
First big problem: how can I set it up so that the height of these columns reaches the footer below? I want it so that when the page loads, both pink and blue columns reach the bottom automatically.
How can I get it so that when the pink column grows beyond its current height, a local scrollbar appears, but when the blue column grows beyond its current height, the overall page scrollbar appears and the footer is pushed down?
- basically, I want the height of the pink and blue columns to ALWAYS be the same height but the height is only determined by the blue column; blue is dominant so it can expand the height of both columns; pink cannot expand the height, just be at the same height as blue
Can this functionality be achieved using only CSS?
Let me know if I need to clarify anything.

There were many issues, so I rewrote it. I have created exactly what you want. Enjoy. =)
http://jsfiddle.net/hRkx8/53/
The trick is to have your main region have a margin-bottom the same height as your footer (which you absolutely position). Thus as your blue thing gets larger, it will start pushing the bottom of the page a bit earlier than it normally would.
(edit: this version moves the footer, which is more difficult to do; however the question asked that the blue area be initialized to be as large as possible, see below for one way to do this)
Here we go! Unfortunately I have to include it inline, since jsfiddle has some severe bugs that prevent proper display. This version has the blue area start all the way at the bottom.
absolutely-positioned elements seem to have some trouble automatically scrolling as the page gets bigger, so I created a dummy #main div much like you did and had it fill the entire viewport, then inside that is both the #footer and #content (your blue and red stuff). The #footer is absolutely positioned so it takes up no space / the document doesn't care about it. As the #content expands, the #main container expands with it, dragging the footer along. The use of a margin-bottom is necessary to prevent the footer from hiding text.
The actual amount of CSS required to do this is, if you remove the demo stuff, just about 5 lines and dummy element.
<html>
<head>
<style>
body {
margin:0; padding:0;
}
* { /* just for demonstration */
box-sizing:border-box;
padding:5px;
border:1px dashed red;
-webkit-border-radius:10px; -moz-border-radius:10px;
background-color:hsla(0,50%,50%, 0.1);
}
/*important to use min-height not height*/
#main {
position:relative; width:100%; min-height:100%;
border:3px solid green;
}
#footer {
position:absolute;
left:0px; right:0px; bottom:0px; height:5em; /*can be anything*/
background-color:lightgrey;
}
#content {
position:relative;
box-sizing:border-box;
background-color:skyblue;
margin-left:auto; margin-right:auto;
padding-bottom:5em; /*must be same as #footer's height*/
margin-top:10%; /*browser bug: actually acts like 20%*/
width:50%;
min-height:80%; /*should equal 100%-marginTop*/
border:3px solid blue;
}
/* dependent elements */
#sidebar {
position:absolute;
top:0px; bottom:0px;
right:100%; width:7em;
background-color:pink;
overflow-y:scroll;
}
#topbar {
position:absolute;
bottom:100%; height:3em;
right:-10%; left:10%;
}
</style>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.5.2/jquery.min.js"></script>
<script>
setTimeout("$('pre').animate({height:1500}, 3000)", 1000);
</script>
</head>
<body>
<div id="everything">
<div id="main">
<div id="content">
<div id="sidebar">
alpha
<br/>
beta
<br/>
gamma
<br/>
etc.
</div>
<div id="topbar">
Menu1 * Menu2 * Menu3 * ...
</div>
This is my site.
Yay.
<pre>
etc.
etc.
etc.
etc.
etc.
etc.
etc.
etc.
etc.
etc.
etc.
etc.
etc.
etc.
etc.
etc.
etc.
</pre>
</div>
<div id="footer">
footer
</div>
</div>
</div>
</body>
</html>

Is it just me, or is the pink elephant in the room sitting on a ...
< T A B L E >
???
Update (April 20th, 11:40AM): Here's the <table> version:
http://juliusdavies.ca/stackoverflow/pink_elephant.html
Be sure to resize your browser window a few times to see it in action.
IE8 - perfect
Chrome - perfect
Safari - no scrollbar, otherwise okay
Firefox - no scrollbar, otherwise okay

based on your most recent answer, I take it you don't need the footer to be full width (only sticky, though yours isn't) and also I presume you know that your version will only work if you know the height of the "foo - not so important content", as you need the that height to set the top co-ordinate for the sidebar .
You version falls down in that when you narrow the window content disappears off the sides.. but based on the thinking behind it - I've used your logic extended it and built in the sticky footer, top menu - everything that was in the original example link.
the footer's not full width, but you can make it look like it is by putting a background image on the html element, I have a plain dummy image in my fiddle but it's not showing up, anyway you would make an image the same height/color as the footer with the 1px border built in
this absolutely relies on you being able to fix/calculate the height of everything above the pink/blue columns
there is a lot less container divs needed for this and the content is now before the sidebar in the source
Here's the fiddle : fullsize : to edit

I see this as a design having a top a middle and a footer. The middle section contains both the pink and blue columns.
Using CSS, place a repeating image in the background of the middle-section behind both the left and right columns. This image would show the edges of both columns. Hopefully your design will accommodate this. I admit I do not know, without really digging into the code, how to make the middle expand all the way down to the bottom. I should think there are some different ways to approach this.
Use css overflow: auto; for your pink column; for the blue, set overflow: auto; on the or tag.
I hope this helps...

How can I prevent one div from overlapping another on resize?

Here's an example: http://la.truxmap.com/truckpage?id=coolhaus
When I make the browser window narrower from the right hand side, the recent tweets div will go underneath the container div. i want to make it so that the recent tweets div can go no further left than the right hand border of the container div. Ive been trying to figure out if it can be done with css, but i cant seem to get it. is there a simple javascript solution that fits the bill?
Thanks!

You can either choose to work with a liquid layout or use the css property position.
Liquid layout:
You got 3 DIV's in your wrapper divand you want them to resize on a smaller browser window, you can do this with percentages that become variable widths :
css:
.wrapper {
width:100%
}
.divleft {
float:left;
width:20%
}
.divmiddle {
float:left;
width:60%
}
.divright {
float:left;
width:20%
}
html:
<div class="wrapper">
<div class="divleft">left</div>
<div class="divmiddle">middle</div>
<div class="divright">right</div>
</div>
As i said, the other possibility is the assigning the css property position to your different DIV's.
Try it yourself, its fairly easy:
http://www.w3schools.com/Css/pr_class_position.asp

You can also keep them from overlapping vertically:
.noOverlap{
float:left;
width:100%;
}