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Symbols | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z use of the keyword bolder. If we were to replace the text in the paragraph with numbers representing the font-weight of each element, we would get the results in Figure 5-13:

<P>
100 <SPAN> 400 <STRONG> 700 <B> 800 </B></STRONG></SPAN>.
</P>
Figure 5-13

Figure 5-13. Changing weight, with the numbers to illustrate it

The first two weight increases are large because they represent jumps

Index: U

U element: 4.1.6. Text Decoration
UA (see user agent)
underlining: 4.1.6. Text Decoration
changing color of: 4.1.6.1. Weird decorations
removing from hyperlinks: 4.1.6. Text Decoration
turned off by browsers: 4.1.6.1. Weird decorations
Uniform Resource Identifier (URI): 3.5. CSS2 Units
Uniform Resource Locators (see URLs)
units: 11.1.3. Case 3: Putting a Magazine Article Online
(see also length units; CSS2 units)
for aural style sheets: 3.5. CSS2 Units
avoiding mixing: 11.1.3. Case 3: Putting a Magazine Article Online
color: 3.6. Summary
universal selector: 10.2.1.1. Universal selector
unordered lists: 7.7.1. Types of Lists
unvisited anchors: 2.4.1. Pseudo-Class Selectors
uppercase text: 4.1.5. Text Transformation
upright text: 5.4.1. Fonts with Style
URI (Uniform Resource Identifier): 3.5. CSS2 Units
URLs (Uniform Resource Locators): 3.4. URLs
HREF attribute and: 1.4.1.1. LINK attributes
referring to in style sheets: 3.4. URLs
specifying for images: 6.2.1. Background Images
user agent (UA): 2.2.2. Grouping Declarations
2.2.2. Grouping Declarations
(see also browsers)
users, selecting alternate style sheets: 1.4.1.2. Alternate style sheets


Symbols | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z


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This positioning is all done using background-position, of course, but there are a whole lot of ways to supply values for this property. First off, there are the keywords top, bottom , left, right, and center. Usually, these appear in pairs, but (as Figure 6-36} shows) this is not always true. Then there are length values, such as 50px or 2cm , and finally, percentage values. Each type of value has a slightly different effect