CSS Layering Divs - css

Question

I want 100% wide divs containing images to go down my page.
On top of these divs, I want one 1210px wide div where I can put my content.
Example:
http://mudchallenger.com/a-responsivee.html
Question:
How can I get the blue box to touch the green box, while red box stays above the two?
Thank you!
I currently have this:
}
#green{
position: absolute;
float:center;
height: 500px;
width: 100%;
margin: 0 auto;
z-index:1;
background-color: green;
}
#blue{
position: relative;
float:center;
height: 500px;
width: 100%;
margin: 0 auto;
z-index:1;
background-color: blue;
}
#red{
position: relative;
float:center;
height: 800px;
width: 1210px;
margin: 0 auto;
z-index:2;
background-color: red;
}

Answer 1

Use background-images to accomplish what you want. Just stack your divs and it should work just fine. If you want your content to span two containers with background images, that's a different story, but the example you cite doesn't do that.
Here's a fiddle giving close to an implementation of what you want. Just replace the container background-colors with background-images and you'd have what you want.
http://jsfiddle.net/CfZu4/
HTML:
<div class="container">
<div class="content">
Blah
</div>
</div>
<div class="container red">
<div class="content">
Blah
</div>
</div>
CSS:
.container{
background-color:#00f;
height:200px;
clear:both;
}
.content{
float:right;
width:40%;
height:150px;
margin-top:20px;
background-color:#0f0;
}
.red{
background-color:#f00;
}

Answer 2

EDIT: Scaled down version for fiddle:
http://jsfiddle.net/dc2bar/asy8Y/2/
HTML:
<div class="background-banner green">
<div class="main-content red">
<!-- content -->
</div>
</div>
<div class="background-banner blue">
</div>
CSS:
.background-banner {
height: 500px;
width: 100%;
margin: 0 auto;
z-index:1;
}
.main-content {
position: relative;
height: 800px;
width: 70%;
margin: 0 auto;
z-index:2;
}
.green{
background-color: green;
}
.blue{
background-color: blue;
}
.red{
background-color: red;
}
EDIT yet again: removed invalid css rule.