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CSS - Z-index & Multiple Absolutely Positioned Elements
Can someone tell me how z-index calculated on two elements that are both absolute position
Similar TutorialsSorry if this has been discussed, I can't seem to find it if it has been. I'm attempting to absolutely display several <div> tags, with padding and a set width/height. However, when I place them side by side, the borders overlap, and the width/height is larger than the values I've assigned. Is there some sort of formula to calculate the left, top, width and height values to make it so they do not overlap, the padding is applied, and the correct width/height is displayed (cross-browser, back to at least IE 6)? Thanks! What causes this? I have my small login form absolutely positioned relative to the content div, and it displays differently when there is/isn't content in it... have a look Test you can click the link to remove the data and position the bitlogin div as it is supposed to be... when the content is added, the bitlogin div moves down approx. 13px... What's the deal? Hi I need to create a base box with 9 sub elements, four boxes in each of the four corners, four edges between the corners and a center box. The problem I'm having is that I can only position the corner and edge boxes precisely if I make the base box absolute and position the sub boxes absolutely. The problem with this though is that the base box "offsetHeight" property never grows when items are added to it. The items appear in their correct position but the base box height is always zero. The only time the base box changes size is if I add text to it. Is there no way to create a box with precisely positioned sub elements that grows in depth in response to added sub divs? Thanks for any help. The goal of the following code is to have a search box with several tabs above it to narrow down the search. The issue is that the design calls for a little upside down triangle to appear below the tab and bleed into the text box. The code works great in Firefox and even in IE6 where the Doctype was switched to HTML 3.2. I'm using 4.01 Transitional and noticing that the arrow doesn't center itself below the tab, rather it centers itself in the entire page. If I take out the width: 100% from .searchbox li.active .downarrow, then both browsers behave the same, although the downarrow now appears in the left bottom corner of the tab rather than the center. Note that I've stripped most of the code away to narrow down the issue. Code:
<style>
.searchbox ul { float: left; padding-left: 10px; list-style: none; padding: 0; margin: 10px 0 0 0; }
.searchbox li { float: left; }
.searchbox li .downarrow { display: none; }
.searchbox li a { display: block; float: left; font-size: 12px; padding: 3px; color: #213327; }
.searchbox li.active { position: relative; }
.searchbox li.active a { color: #fff; border: 1px solid #b3b2b0; background: #266d1e url('/c2footsearchbg.jpg') repeat-x scroll top left; }
.searchbox li.active a:hover { text-decoration: none; }
.searchbox li.active .downarrow { display: block; position: absolute; bottom: -9px; width: 100%; height: 10px; text-align: center; margin: auto; }
.searchbox div { clear: both; display: inline-block; }
.searchbox input.txt { border: 2px solid #999; padding: 5px 0 0 3px; width: 305px; height: 30px; }
.searchbox input.submit { font-weight: bold; font-size: 12px; color: #fff; width: 71px; height: 30px; border: 0; background: transparent url('/c2searchbutton.jpg') no-repeat scroll top left; vertical-align: top; cursor: pointer; }
.searchbox input.submit:hover { background-position: 0 -30px; }
</style>
<div class="searchbox">
<h3>Search</h3>
<ul id="c2FootSearch">
<li class="active"><a href="/index.php">Main</a><div class="downarrow">↓</div></li>
<li><a href="/groups/">Groups</a><div class="downarrow">↓</div></li>
<li><a href="/people/">People</a><div class="downarrow">↓</div></li>
<li><a href="/petitions/">Petitions</a><div class="downarrow">↓</div></li>
<li><a href="/news/">News</a><div class="downarrow">↓</div></li>
<li><a href="http://www.google.com">Google</a><div class="downarrow">↓</div></li>
</ul>
<div>
<form action="/searchall.html" method="post">
<input type="hidden" name="search" value="main" />
<input type="text" name="q" class="txt" />
<input type="submit" value="Search" class="submit" />
</form>
</div>
</div>
I've been playing around with centering an absolutely positioned div and in this post is the method I've come up with. I've tested it in firefox and IE but am curious as to whether it works in opera and if there are better ways of doing it. The div needs to be absolutely positioned because I'm using top & bottom to set it's height. Here's the code Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<title>Center Test</title>
<style>
body
{
margin: 0px;
height: 100%;
}
.centered
{
position: absolute;
border: 2px solid black;
width: 196px;
background: orange;
margin: auto;
top: 100px;
left: 0px;
right: 0px;
bottom: 100px;
min-height: 50px;
height: expression((document.body.clientHeight < 250 ? 50 : document.body.clientHeight - 200 ) + 'px');
left: expression('auto');
right: expression(((document.body.clientWidth < 200 ? document.body.clientWidth - 200: document.body.clientWidth / 2 - 100 )) + 'px');
}
</style>
</head>
<body>
<div class='centered'>
I'm a centered absolutely positioned div.
</div>
</body>
</html>
I have an absolutely positioned <div> containing a block of text. I have not specified a width for this <div>. This <div> is nested within another <div> for which I have specified a width of 200px. So something like: html4strict Code: Original - html4strict Code <div style="position: relative; width: 200px;"> <div style="position: absolute; top: 10px; left: 20px; z-index: 100;"> Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Curabitur eu purus a tellus mollis consequat. Phasellus aliquam sapien quis mauris. </div> </div> <div style="position: relative; width: 200px;"> Since the absolutely positioned <div> is not part of the page's normal flow, I would expect that its width would expand according to its contents (and the browser window's boundries). Instead, in Firefox only, the width of the absolutely positioned <div> expands only to the width of its parent - in this case 200px. Am I doing something wrong? or is there a workaround for this? Hi I've come up on the old <select> elements showing through <div>s that are made visible on top of them. What I want to do is find out the id's of the select elements under my <div> so that i can hide them using CSS / Javascript. The basic layout of my page is a grid of <select> elements, each one of these would have a hidden <div> layer associated with it containing extra information etc. By the side of each of the <select> elements is a little image / button that the user will click and the layer with the extra stuff in is made visible. The layer will overlap a number of <select> elements (not the parent <select> element). Each <div> pops up in a different position (calculated dynamically as an x,y offset from the parent) can I find the Ids of the elements it overlaps? Hope this is clear, and thanks in advance. flipflops. The form elements (<select> specifically) on a background layer seem to be showing through a <div> layer positioned above it (at least in IE.) Does anyone know a trick or some such to stop the form elements from the background from showing through the <div>? t h a n k s Below is a simple test page that fails to load properly on the Mozilla browser. It appears to work properly in IE. Any suggestions to getting the span width to set properly, based upon the content of the span would be a great help. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html> <head> <title>Span test</title> <style TYPE="text/css"> .submenu { background-color: #FFFFFF; color: #D4BA6B; border-top: 0px solid #000000; border-left: 0px solid #000000; border-right: 0px solid #000000; border-bottom: 0px solid #000000; position: absolute; margin: 0px; padding: 0px; min-width: 100px; visibility: visible; z-index: 1; } .submenuItem { background-color: #FFFFFF; color: #000000; border-left: 2px solid #ff0000; border-right: 2px solid #ff0000; border-bottom: 2px solid #ff0000; border-top: 2px solid #ff0000; font-family: "arial narrow", arial, verdana, sans-serif; font-weight: normal; font-size: 12pt; padding-top: 2px; padding-bottom: 2px; padding-right: 5px; padding-left: 5px; position: absolute; z-index: 1; cursor: pointer; cursor: hand; } </style> <SCRIPT LANGUAGE="javascript"> function getWidth() { oSpan = document.getElementById("testSpan"); iWidth1 = oSpan.offsetWidth; alert ("Width1 = " + iWidth1); } </SCRIPT> </head> <body onload="getWidth()"> <div class="submenu"> <span class="submenuItem" id="testSpan">This is the item that I am testing today.</span> </div> </body> </html> Hi, I have been puzzle for a while now working out how to do this. I have two fixed height divs which I want to appear on the same line (inline). However to maintain the fixed height they cannot be set as display: inline; (Well that works in IE but not in Firefox). Anyway I find out that setting one div to float left and the other to float right with another div with clear:both works fine. However when it comes to setting the position of the flash elements I want in each div element it works now in Firefox but not in IE. I currently have: <div id="diva"> <object id="face1" width="320" height="110"> <param name="face1" value="face1.swf"> <embed src="face1.swf" width="320" height="110"> </embed> </object> </div> <div id="divb"> <object id="face2" width="320" height="110"> <param name="face2" value="face2.swf"> <embed src="face2.swf" width="320" height="110"> </embed> </object> </div> <div id="clear"></div> With the relavent css: #div1 { background-image : url(images/bg1.gif); width: 381px; height: 346px; float: left; text-align : center; vertical-align : bottom; } #div2 { background-image : url(images/bg2.gif); width: 381px; height: 346px; float: right; text-align: center; vertical-align : bottom; } #clear { clear: both; } img { border: 0px; } #face1{ padding-top: 220px; left: 30px; } #face2{ position: relative; top: 220px; left: 10px; } Effectively what I want is: Where the divs are on the same line and are fixed height (as they have a background) and then each swf element releatively positioned inside the div...which will work in Firefox and IE! Thank you for your time. Okay I learned html/css about two years ago, and haven't really used it much since. but I'm trying to get back into it and have run into a problem with my design. Basically what I have is a DIV tag in the index that is used to center everything on the page, and provide a border. Basically what I wanted to do was add buttons that I made in photo shop and a banner to every page I'm making, so I put them in a SSI file. That works just fine, but what I'm trying to do is make them positioned relatively positioned to the DIV in the index but still have them in the SSI file, but every time I try to add the styles to either my SSI file, style sheet for the index page, or right to the main index it wont position them inside the div. Sorry if that really didn't make sense. If you need an example take a look at the texts from last night home page (sorry it wont let me include a url) and I'm trying to get it kinda like that but with the buttons along the top of that centered outlined portion, and the banner above that. I'm really stumped here, ladies and gentlemen, so if anyone has any idea how I can get this working that would be amazingly helpful. And if I missed anything you need to know just let me know, its pretty late and I can't really think straight right now, haha Thanks in advance. I'm using a relative-positioned div as a container for an image, which is absolute-positioned. I'm doing this so that the image will automatically scale down to fit inside the containing div (nothing else I've tried has done this for me- so if there is another way to achieve this, please fill me in). This part works fine, but the image isn't as wide as the containing div, so I would like to center the image inside the div- but I can't seem to get it to work. I tried the obvious text-align:center in the div. That actually worked... kinda. The image's left-side was in the center of the div, but obviously isn't the 'centering' that I'm looking for. I then tried setting margin-left and margin-right on the image to auto, and that did nothing. I suspect that the fact that I have my image absolute-positioned is the culprit here, but I don't know how to get around it- or IF I can get around it without drastically changing my approach. Admittedly, the container div resides inside a table cell. I know that isn't the best practice, but I spent so much time trying a div-only approach only to waste time and become frustrated that I went back to what I know works- at least for now. I tried removing the container div from the table and inserting the image directly to the table cell- but encountered more issues with the sizing of the image. Essentially, my code is something like this: CSS: Code:
td#CONTENTDISPLAY
{
width: 100%;
height: 100%;
text-align: left;
vertical-align: top;
padding: 0 0 0 0;
margin: 0 0 0 0;
}
div#CONTENTBANNER
{
position: relative;
height: 100%;
padding: 0 0 0 0;
}
img.CONTENTIMG
{
position: absolute;
height: 100%;
}
HTML: Code:
...
<td id="CONTENTDISPLAY">
<div id="CONTENTBANNER">
<img class="CONTENTIMG" />
</div>
</td>
...
Nothing flashy, I know. One thing I should mention, however, is that the image is ALWAYS placed inside the container div using a Javascript function (it's a dynamic image). I doubt that makes a difference, but I figure it's worth mentioning. Can anyone help point me in the right direction? Thanks! - skubik Hello, I have a css/javascript drop-down menu (see code) in my website's header. Just below the header area, I have 728x90 Flash banners from various 3rd party ad networks. Depending on the banner, sometimes the drop-down menu properly appears on top of the Flash banner, and other times it drops down behind it, making it unusable. No amount of adjusting the z-index property seems to help. I have no control over the banners since they are served by a 3rd party system. Is there anything I can do to my drop down menu to always make it appear on top of everything, including all Flash content? Thanks! Ok, I have a really weird problem (don't you love it when people start like that?). I have four elements absolutely positioned inside of a relatively positioned div. As you probably already guessed, everything renders correctly in FF/Moz, but screws up in IE. In the following code, please ignore any validation mistakes, as the real page does validate xhtml 1.0 strict. Code: <div id="outside">
<div id="inside">
<img id="logo" src="logo.png" />
<img id="banner" src="banner.png" />
<img id="topRightCorner" src="topRightCorner.png" />
<img id="bottomLeftCorner" src="bottomLeftCorner.png" />
</div>
</div>
Code: #outside #inside{
position: relative;
top: 0;
left: 0;
/* positioned parent */
}
#outside #inside #logo{
position: absolute;
top: 50px;
left: 50px;
/* logo */
}
#outside #inside #banner{
position: absolute;
top: 60px;
left: 75px;
}
#outside #inside #topRightCorner{
position: absolute;
top: 0;
right: 0;
}
#outside #inside #bottomLeftCorner{
position: absolute;
bottom: 0;
left: 0;
}
The first three position corectly. "bottomLeftCorner" seems to follow its own path, and aligns its self to the bottom of the "outside" div. If I remember correctly, absolute positioning of an element will position it absolutely (duh) in relation to its nearest positioned parent, which in this case is my "inside" div. Here's where it gets quirky (no pun intended) though. When I change the position attribute from "bottom" to "top", the element will gladly position its self wherever I want it, within the "inside" div. Is the "bottom" attribute causing a problem within IE? Am I trying to reference too many child ID's for IE to handle? Am I missing a rule that says the parent has to have the EXACT same atributes as the child? I assume the answer to all three is no, but I thought I'd give it a shot here anyways. Any ideas? Thanks, all! I took an example from w3.org (shown below) and it doesn't work. From http://www.w3.org/TR/css3-content/ Quote: 4.2.2. Inserting multiple '::before' and '::after' pseudo-elements In contrast with the previous section, the selector '::before(2)' represents a pseudo-element before another, both of which are contained at the start of an element. For example, the following rules: div { content: 'A' } div::before { content: 'B'; } div::before(2) { content: 'C'; } ...would result in the following rendering objects: ,-----------------------. | ,---. ,---. | | | C | | B | A | | `---' `---' | `-----------------------' The '::before' selector is exactly equivalent to '::before(1)'. A pseudo-element only exists if all the elements and pseudo-elements leading up to it exist. For instance, in the following example, only one pseudo-element is generated, the first one: div { content: 'A' } div::before { content: 'B'; } div::before(2) { content: inhibit; } div::before(3) { content: 'C'; } It would result in the following rendering objects: ,-----------------------. | ,---. | | | B | A | | `---' | `-----------------------' So my code is Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Test Page</title>
<style type="text/css" media="screen">
div { content: 'A' }
div::before { content: 'B'; }
div::before(2) { content: 'C'; }
</style>
</head>
<body>
<div>Test Div</div>
</body>
</html>
And the output is "BTest Div". Firefox error console comes up with Quote: Warning: Function token for non-function pseudo-class or pseudo-element, or the other way around, when reading 'before'. Ruleset ignored due to bad selector. Line: 10 I get a similar error when I validate it with W3.org using CSS level 3 Quote: 10 div Parse Error div::before(2) { content: 'C'; } I just find it odd because I copied the example off of their site and then when I validate it the code comes back as invalid. Any ideas? I'm making a page with what amounts to footnotes 1 . Some sources may be referenced more 2 than 2 once 2 , and when any of them is hovered over, I'd like all items in the same class to be highlighted 3 , so when i hover over this little number three 3 , I want this next number three 3 and the actual reference down below to all change color. Is there any to do this without using javascript? (I don't care if it doesn't work in IE6 - I know that has hover issues... 4 ) 1 - Like This! 2 - that one was used 3x 3 - This is red and so are all the little #3's up there 4 - I'm just using Firefox I have a section of my application where I need a menu containing forms in a box aligned to the left. When one of these form names are clicked, I need it to unhide the div and display the proper form to the right of the menu. This works fine in Internet Explorer, but when the forms become visible in Firefox they completely cover up the menu. Here's what I've got: CSS Code: #forms .form { display: none; position: absolute; left: 0; top: 0; }
#forms { position: relative; }
#adminbar { float: left; border: 1px solid #000; padding: 5px; position: relative; }
HTML Code: <div id="adminbar">
<a href="javascript:void(0);" onclick="hide(getElementsByClassName('form')); show('software');">Software</a>
</div>
<div id="forms">
<div id="software" class="form">
<h1>Software Administration</h1>
<form class="ttcform">
<fieldset>
<legend>New Software Item</legend>
<ol>
<li>
<label>Software Name</label>
<input type="text" size="30" name="name"/>
</li>
</ol>
</fieldset>
<fieldset class="submit" align="center">
<input type="submit" name="submit" value="Create Software"/>
</fieldset>
</form>
<hr>
<form class="ttcform">
<fieldset>
<legend>Edit Software Item</legend>
<ol>
<li>
<label>Software Name</label>
<input type="text" size="30" name="name"/>
</li>
</ol>
</fieldset>
<fieldset class="submit" align="center">
<input type="submit" name="submit" value="Create Software"/>
</fieldset>
</form>
</div>
</div>
Javascript (In case you need it): Code: function show(el) {
if(typeof el == 'string') {
document.getElementById(el).style.display = 'block';
return true;
}
else if(typeof el == 'object') {
for(var i = 0; i < el.length; i++) {
if(typeof el == 'object') {
hide(el[i].id);
}
else {
hide(el[i]);
}
}
return true;
}
return false;
}
function hide(el) {
if(typeof el == 'string') {
document.getElementById(el).style.display = 'none';
return true;
}
else if(typeof el == 'object') {
for(var i = 0; i < el.length; i++) {
if(typeof el == 'object') {
hide(el[i].id);
}
else {
hide(el[i]);
}
}
return true;
}
return false;
}
function getElementsByClassName(className) {
var retEls = [];
var els = document.getElementsByTagName('*');
for(var i = 0; i < els.length; i++) {
if(els[i].className == className) {
retEls.push(els[i]);
}
}
return retEls
}
Hey everyone, I remember once reading an article on positioning everything relative when doing a float site using CSS. The problem is, if I do something like: css Code: Original - css Code html *{ position:relative; }
It seems to only apply relative positioning to absolutely nothing. Then if I do something like: css Code: Original - css Code html * *{ position:relative; }
It seems to apply anything that is an immediate child of <body> Now the real problem is, if I do something like: css Code: Original - css Code html * * *{ position:relative; }
It seems to only apply the relative positioning to grandchildren of <body>. That is to say children of children of <body>. IE: html4strict Code: Original - html4strict Code <body> <div><!-- not relative --> <p><!-- is relative --> </div> </body>
Is there way to easily set it up so that everything is relatively positioned? |
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