CSS: Image fixed at top?

1,893 · May 15, 2011

I'm trying to modify a WordPress theme (The Morning After) and I have an image that is set to [repeat-x top] and I want it to stay fixed so that no other images will appear over top of it or replace it. Ideally I'd like to have any images I upload for the background show up below the bottom of image I want to have fixed.

Any help is greatly appreciated. My current CSS is below:

body { background: #f8f8f8 url(images/headers/top-bg.png) repeat-x top; }

Example below:

May 15, 2011

Z-Index CSS property should help: http://www.w3schools.com/css/pr_pos_z-index.asp

Elements with a higher number (index) are positioned in front of elements with a lower index.

1,893 · May 15, 2011

When I used position: my site shifts everything to the left...

May 15, 2011

Glen is right, you're going to need to fiddle with the z-index of both the body and the banner you're trying to keep fixed. The best thing to do is encase the banner in a div and create a background image inside that div.

The following should work:

body {
   background: url(whatever.jpg);
   z-index: 0;
}

#repeated-banner {
   background: url(repeated-banner-image.jpg) repeat-x;
   position: fixed;
   z-index: 1;
   height: 20px; /* Or however high you want it */
   width: 100%;
}

9,393 · May 15, 2011

Make a new Div, what you want to do isn't exactly possible, as the new background image you specify for the body will have to have some fake padding at the top. It won't automatically start below your banner.

#banner{
background: #f8f8f8 url(images/headers/top-bg.png) repeat-x top;
width : 100%;
height : 100px;
z-index : 10;
position : fixed;
top : 0px;
left : 0px;
}
body{
background: #f8f8f8 url(images/headers/top-NEWBACKGROUND.png) repeat-x 0px 100px;/*same PX as above*/
}

I haven't test this, I just wrote it out in the post editor. So check syntax if it goes wrong.

1,893 · May 15, 2011

Thanks for the input, CSS is definitely not my fort?. I've attached an image to the original post in hopes that it will help show just exactly what I'm trying to do. So far I've tried JAGFin1's code, no success yet though.

9,393 · May 15, 2011

Do you want the second image to move when the user scrolls, or do you want it to be a fixed background?

Which of these is nearest? (ignore the file names)

http://lmky.co.uk/test/bottom-align-text-2.htm

http://lmky.co.uk/test/bottom-align-text.htm

1,893 · May 15, 2011

On 15/05/2011 at 21:02, lunamonkey said:

Do you want the second image to move when the user scrolls, or do you want it to be a fixed background?

Which of these is nearest? (ignore the file names)

http://lmky.co.uk/test/bottom-align-text-2.htm

http://lmky.co.uk/test/bottom-align-text.htm

http://lmky.co.uk/test/bottom-align-text-2.htm

That's essentially what I'm looking for. I want the top-bg image to span 100% width on the left and right of the header. Then I want a full bg image to start just below the to-bg, fixed. I'm just having a hard time getting both images to show up, let alone in the right places...

Again, i really appreciate the help guys.

2,549 · May 15, 2011

make a div for the other bg's and inside that div put a another div for the bg that needs to be on top

May 15, 2011

On 15/05/2011 at 20:59, Elessar said:

Thanks for the input, CSS is definitely not my fort?. I've attached an image to the original post in hopes that it will help show just exactly what I'm trying to do. So far I've tried JAGFin1's code, no success yet though.

Right, I think I know what to do... I've just done a quick mock-up using background colours and Lorem Ipsum to test the scrolling and the position of the banner. This is the code I used:

&lt;html&gt;
   &lt;head&gt;
      &lt;style type="text/css"&gt;
         body {
	    background-color: blue;
	    z-index: 0; /* Lowest index for the body and anything in it unless stated otherwise*/ 
	    margin: 0;
	 }

	 #scroll-header {
	    background-color: red;
	    position: fixed;
	    height: 200px;
	    width: 100%;
	    z-index: 1; /* Put it on top of the body */
	    top: 0; /* Make sure it is ALWAYS at the top */
	 }

	 #content {
	    margin-top: 200px; /* Content placed in this wrapper, with a top margin matching the height of the banner */
	}
      &lt;/style&gt;
   &lt;/head&gt;

   &lt;body&gt;
      &lt;div id="scroll-header"&gt;
      &lt;/div&gt;

      &lt;div id="content"&gt;
         LOREM IPSUM WENT HERE.
      &lt;/div&gt;
   &lt;/body&gt;
&lt;/html&gt;

The idea is to wrap all of the content on the page in a containing div as it gives you control over its position. The body is a BIG thing and you generally don't put raw content in it (without initially placing it inside another div). If you wrap all of your content in the #content div, you can make sure that it begins below the banner. When it scrolls, anything within the content div (with an index of 0) will scroll under it (because it has a lower index than the banner).

Give that a go and give me a shout if you have any problems, detailing what exactly went wrong. I understand that you're messing about with WP so it's a bit more difficult, but I've outlined the theory behind what you're trying to do.

1,893 · May 15, 2011

Whoa, that's a lot of code. So far I've been dabbling in the style.css, do I need to put the code above elsewhere? Like the header or something? If so, I'll need to be careful seeing as how this is a WP theme and messing something up in there could break the entire theme.

May 15, 2011

I just added the code above to keep it together. I just looked at your example and can see what you're up to.

Basically, if you want to push the content of your page down so that it starts below the banner, you need to edit the CSS for the main container of content that WP uses. I'm sorry but I don't know what class that is, so you'll have to find it (or wrap all content in your own).

The basic principle relies on two things: the index of the banner, and the top-margin location of the content. If you look at my code, you'll see that #content has a top-margin: 200px. That matches the height of the banner, meaning that the content starts when the banner finishes. It's also important to make sure the banner has a top: 0; so that it explicitly starts at the top of the page.

The only thing you really need to be paying attention to is this:

#scroll-header {
   background: url(banner.jpg) repeat-x;
   position: fixed;
   height: 200px;
   width: 100%;
   z-index: 1; /* Put it on top of the body */
   top: 0; /* Make sure it is ALWAYS at the top */
}

#content {
   margin-top: 200px; /* Content placed in this wrapper, with a top margin matching the height of the banner */
}

It's no use relying on the body for moving content down as the banner is also part of the body, which encases everything on a web page. Like lunamonkey stated, you need to use divs in order to fix the positions of the conflicting objects.

Edit: I've just realised that lunamonkey has used a slightly different method to me. Swings and roundabouts I suppose.

1,893 · May 15, 2011

See, the problem is the ONLY thing I want to push below the top-bg is the background image. With what you posted above it sounds like I'll be pushing EVERYTHING content-wise below the top-bg which will throw everything that is currently in the header completely off...right? Is there anyway to use two images for the bg within the CSS, instead of hacking WP? I want to make sure upgrading WP for security fixes is as painless as possible.

May 15, 2011

So, you're saying that you want the background image of the body to appear at a lower top-margin to the actual content of the body? Erm...

You'll probably want something like:

body {
   background: url(img.jpg) 0px 200px repeat-x;
}

That will repeat the background across the x-axis, and place it 200px from the top of the container.

You'll have to excuse the ambiguity, I'm quite tired!

1,893 · May 15, 2011

On 15/05/2011 at 21:53, JAGFin1 said:
So, you're saying that you want the background image of the body to appear at a lower top-margin to the actual content of the body? Erm...

You'll probably want something like:
body {
   background: url(img.jpg) 0px 200px repeat-x;
}
That will repeat the background across the x-axis, and place it 200px from the top of the container.

You'll have to excuse the ambiguity, I'm quite tired!

No excuse needed, I'm extremely appreciative that people are taking the time to try and help a newb :)

9,393 · May 16, 2011

On 15/05/2011 at 21:49, Elessar said:

Is there anyway to use two images for the bg within the CSS, instead of hacking WP? I want to make sure upgrading WP for security fixes is as painless as possible.

wordpress upgrades don't touch the themes. You can hack the themes all you like. As long as wordpress don't change the engine completely, but then that would break all themes.

1,893 · May 17, 2011

I was under the impression I'd have to hack a few of the WP files. So far no luck, granted I'm in no way a coder. Right now I'm trying to figure out how to make the background image work along side the top-bg image that spans the top of the page...all in CSS.

Now, one question I do have is the 'Background' option under Appearance in WP...where would I edit that file? Surely that is within the WP files themselves and not the theme, making me question if I could set some attributes there to make the background image I upload show up below any other images from the theme(s)...

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CSS: Image fixed at top?

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