CSS - Get A Css Class Name That Accept Other Class Name And Add-on

The book i am reading does not clear this up. When would you use class vs id to put elements in different catagories? why not use all id? It seems to make more sense.. ie. make all headers id="header"
and divs also class.

thank you in advance

I am new to CSS and confused about when to use id # and when to use class .

Some enlightenment on the benefits/purpose of each would be helpful. I have read several tutorials - but the same pretty much the same to me so I must be missing something

Thanks!

So I want to create a really simple css file that uses a lot of the same styles. For example I may create a box that takes up two fifths of the page, and is floated left or right, similarly I may have a box that takes up three fifths, or four fifths etc.

The main thing here is that I'm thinking the specifics will be placed inside an ID like so:

Code:

#twoFifths {width:275px; padding: 0px 12px 0px 50px;}
#threeFifths {width:375px; padding: 0px 50px 0px 12px;}

And then to handle the float I'd use a class like so:
Code:

.floatRight{float:right;}
.floatLeft{float:left;}

Is this considered good practice? Obviously as I generate layouts I may want to float either right or left so having an ID for every single thing I may want to use would be a little overwhelming. The problem with this of course is that I can't call an ID twice in a page, and I can't have more than one class... so for example:

Code:

	<div id="templateBlueBox" class="floatRight">
		<h2>Six free lessons</h2>
		<p>These free Lessons are great to read online or print out and carry with you.</p>
					</div>
					
	<div id="templateGreenBox" class="floatRight">
		<h2>New Features</h2>
	        <p>Some fun, helpful study tools to help you get more out of every Lesson. Check them out!</p>
					</div>
				
	<div id="templateOrangeBox" class="floatRight">
		<h2>Sign up for email updates</h2>
		<p>So we can let you know when you can subscribe to get it every week.</p>
	</div>
					
	<div id="templatePinkBox" class="floatleft">
			<h2>Send us feedback</h2>
			<p>Is it the coolest thing ever (or is it just okay)? Tell us what you think!</p>
			</div>
					
	<div id="templateBlueBox" class="floatLeft">
		<h2>Submit photos</h2>
		<p>
		You can be part it..</p>
	</div>

So as you can see I'm having to repeat the id templateBlueBox. Is there a better approach for accomplishing this?

I'm using ASP.NET 2.0 for my site. I already have a CSS that is working for the site; however, because an ASP.NET lable requires CSS Class, how do I convert my current CSS to a CSS Class? I know that a CSS class start with a period then a unique name. The problem is how do I implement the li, ul, a, and so on. Here is what I have that I want to convert to a CSS Class.

#nav {
padding: 0;
clear: both;
}
body.main #nav, body.blogger #nav {
float:right;
width: 220px;
\width: 250px;
w\idth: 220px;
margin: 10px 10px 0 0;
padding: 0;
}
body.second #nav {
float:left;
width: 200px;
\width: 210px;
w\idth: 200px;
padding:0 0 20px;
margin: 0;
}
body.second #nav img {
padding-bottom: 10px;
}
#nav a { color: #006; }
body.second #nav ul {
list-style: none;
padding: 0 0 0 5px;
margin: 0;
}
body.second #nav ul li {
margin: 0 0 7px 0;
font-size: 11px;
}
body.second #nav ul li ul li { margin: 0 0 5px 15px; }
.skip { display:none; }
/* end #nav */

#content p, #nav p {
padding: 0;
margin-top: 0;
margin-bottom: 10px;
line-height: 140%;
}
#content li, #content ol {
margin-top: 0;
line-height: 140%;
}
code, pre { font-family:"Courier New", Courier, mono, monospace; }

/* definition lists, all that and a bag of chips! */
#content dl {
margin:0px;
padding:0;
}
#content dt { font-weight: bold; }
#content dd {
margin-top: 0;
margin-right: 0;
margin-bottom: 10px;
margin-left: 0;
padding: 0 5px 0 0;
}
/* end definition list*/

Any help is appreciated.

Problem solved.

When defining css in a webpage, it can be done using either a class or id. My understanding is that css uses . notation with classes and # notation with id's, regardless of whether the actual css is in the webpage itself of linked externally. Please correct me in error. My css uses classes and external . notation. When I use id's only and # notation exernally, I lose all my styling. Its only when I use the # notation internally that the styling works. In order to use external css I need to declare both a class and id and dot notation. Internally only an id. Is this correct behaviour?

I have a form with a list of things. The number of things in the list is variable, depending on certain factor, different things, different numbers of things. Next to each thing is a radio button.

There is a question with two radio buttons, "yes" and "no".

When "no" is selected, I want the radio buttons to be disabled, and the color of the text to change to gray.

For the radio buttons, I have a simple JS function: javascript Code:
Original - javascript Code function enableCFFID() { document.cartform.cffid.disabled=false; } function disableCFFID() { document.cartform.cffid.disabled=true; }

  

  


 function enableCFFID()


 {


     document.cartform.cffid.disabled=false;


 }


 function disableCFFID()


 {


     document.cartform.cffid.disabled=true;


 } 

For the test that goes with each thing, obviously I don't want to have to assign unique ID (perhaps in a span tag that encloses the text). I would want a common name for all of them.

But this would mean I can't use getElementById.

What other method can I use to change the class for a group of span tags who's number is variable?

Hi all.

Code from the php file:
PHP Code:
<?php /* If this is a monthly archive */ } elseif (isset($_GET['paged']) && !empty($_GET['paged'])) { ?>
<p class="browsing">You are currently browsing the <a href="<?php echo get_settings('siteurl'); ?>"><?php echo bloginfo('name'); ?></a> weblog archives.</p>
<?php } ?>



Page is at http://www.bartlett-family.net/chri...tt/blog2/?cat=1

You can see on the right where the text is right below the blog search.

Why is the text not formatted to the left?
CSS code:
Code:

.browsing {
	text-align: left;
}

Simple enough. I've put in other CSS attributes just to test. Absurd things like font-family: Arial, Helvetica, Sans-Serif;
& font-size: 8em; just to see if I was missing something small.

Nothing, the class just isn't working. Huh?

Chris

Hi all,
I am using <tr class="caption"> in order to control the properites of a line in a table. The problem is: this will not work. Nothing that is written in this CSS tag will work

my CSS tag:
Code:

tr.caption {
	font-weight: bold;
	font-size: 14px;
	text-decoration: none;
	background-color: #000000;
	color: #FFFFFF;
                       }

any idea why??

I am greateful for any answer!
Dekers

hi there

trying to create a overlapping div
but this wouldn't work
Code:

#overlapBar {
	position:absolute;
	width: 250px;
	height: 270px;
	z-index: 2;
	top: 10px;
	left: 600px;
}

but with a layer it does work
Code:

<div id="overlapBar" style="position:absolute; left:600px; top:5px; width:250px; height:270px; z-index:1 ">

I like to have all my css in one file, so how can I overlap and position with <div>

thnks in advance

Hi .. Im still new to all of this (Web and CSS in general) but would like to know if the following is a possiblity... assuming the CSS Below ...

div#item{
width: 200px;
height:100px;
}

div#item_image{
width:50px;
height:100px;
background-image:url(blahblah);
}

div#item_text{
width: 140px;
height:100px;
(...other properties)
}

then when I create an instance of this i use the following HTML

<div id = "item">
<div id = "item_image>
</div>
<div id = "item_text>
</div>
</div>

I know its maybe not the best way to do it .. but im trying to illustrate a point ... each time I create an "item" I am required to redeclare or redefine the child divs ... is there any way I can "embed" (for lack of a better word !) the children so that everytime I create an "item" it automatically creates the "item_image" and "item_text"

so basically .. my HTML will just be

<div id = "item"></div>

and nothing else ??

Thanks for any guidance ...

Just wondering why this code dosent work? I want to have image mapping and i want it to be under a class so thatt in my style sheet i can move it anywhere i want.

Html code
Code:

<img class="20sub"
img id="20sub" 
src="images/20sub.gif" usemap="#20sub" 
border="0" width="130" height="123" alt="20sub" />
<map id="20sub" name="20sub">
<area shape="rect" coords="0,0,125,118" 
href="http://www.google.com" alt="20sub" title="20sub"  />	
</map>

Style code
Code:

.20sub
{
position: absolute;
right: 640px;
top: 150px;
}

Thank you for all the help

Hi,

I was wondering if anyone could explain why I should use the id attribute of div. The id attribute is only usable once on a page. This seems to me to be slightly innefficient when I could use a class attribute and reuse the style on the page.

Also, specifying an id as follows:-

div#maincontainer span.innerblock {
.........
}

Once again, by doing this I have not only confined the innerblock stye within the maincontainer id, but also to the span tag. Again, this stops me re-using the style elsewhere.

By using these methods (perhaps inappropriately), I am ending up with bloated css. I'm sure I'm missing something here . I would be really grateful if someone could explain the logic behind these two methods.

Many thanks in anticipation.

hi everybody, i have the following problem

my code

Code:

.....
<table>
<colgroup>
<col class="makemebig" />
<col class="text" />
</colgroup>
<tr>
<td>Date:</td>
<td>12.2.12</td>
</tr>

</table>
...

in ie the cols have the right format, but in firefox they have the standard format. what's wrong? i googled but found nothing senseful.

can anybody help me?

Trying to migrate vbulletin software to xhtml 1.1 using CSS and I have run into a bit of a problem.

It was my understanding that a class can have the same name as another class but behave differently if the parent classes are different.

For example:

table.main .bigWrap .color {
color: blue;
}

Would be different than:

table.sub .bigWrap .color {
color: red;
}

I assumed that .color's parents dictate it's behaviour so main tables and sub tables will display different colors. Is this indeed the case or am I off base?