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Index: M

margin-bottom property: 7.3.4. Single-Side Margin Properties
margin-left property: 7.3.4. Single-Side Margin Properties
margin property: 7.3. Margins
margin-right property: 7.3.4. Single-Side Margin Properties
margin-top property: 7.3.4. Single-Side Margin Properties
margins: 7. Boxes and Borders
7.3. Margins
collapsing: 7.3.5. Collapsing Margins
block-level elements: 8.2.1.2. Collapsing vertical margins
floated elements: 7.6.1. Floated Elements
horizontal, noncollapsing: 8.2.2. Horizontal Formatting
inline elements and: 7.3.7. Margins and Inline Elements
caution with: 7.3.8. Margins: Known Issues
length values and: 7.3.1. Length Values and Margins
negative (see negative margins)
vs. padding: 7.2. Margins or Padding?
percentages and: 7.3.2. Percentages and Margins
replication: 7.3.3. Replicating Values
single side, setting margin for: 7.3.4. Single-Side Margin Properties
table cells and: 1.3.1. Limited Initial Scope
markers: 8.2.3. List Items
8.2.3. List Items
10.4.2. Markers
matching hyphenated values: 10.2.2.5. Matching hyphenated values

The default value of padding is 0 (zero), and padding values cannot be negative.

WARNING

Opera 3.5 allows negative padding values, but this was fixed in Opera 3.6. The other browsers don't allow negative padding lengths.

matching single attribute values: 10.2.2.3. Matching single attribute values
max-height property: 9.1.3.2. Limiting width and height
max-width property: 9.1.3.2. Limiting width and height
media types: 1.3.1. Limited Initial Scope
10.8. Media Types and @-rules
Microsoft Internet Explorer (see Internet Explorer)
middle alignment: 4.1.3.5. In the middle
millimeters (mm): 3.2.1. Absolute Length Units
min-height property: 9.1.3.2. Limiting width and height
min-max properties: 9.1.3.2. Limiting width and height
min-width property: 9.1.3.2. Limiting width and height
monospace fonts: 5.1. Font Families
multiple pages, using styles on: 1.2.3. Using Your Styles on Multiple Pages


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simply been pulled upward by its negative top margin, such that it's outside the parent DIV !

Figure 8-22

Figure 8-22. The effects of a negative top margin

With a negative bottom margin, though, it looks as though everything following the paragraph has been pulled upward. Compare the following markup to the situation shown in Figure 8-23:

DIV {border: 1px solid black;}
P.neg {margin-bottom: -50px; width: auto; margin-right: 10px;

BODY {color: rgb(0%,50%,0%); background-color: #CCFFCC;}
H1, H2 {color: yellow; background-color: rgb(0,51,0);}
Figure 6-19

Figure 6-19. The results of a simple style sheet

This style sheet is more sophisticated (shown in Figure 6-20):

BODY {color: black; background-color: white;}
P {color: #333;}
PRE, CODE, TT {color: rgb(50%,50%,50%); background-color: #FFFFCC;}
A:link {color: blue; background-color: yellow;}

So let's say we want all first-level headings to be maroon. Thebest declaration would be:

H1 {color: maroon;}

Simple, straightforward, and difficult to forget. It doesn'tget much better than that. Here are a few more examples:

H1 {color: gray;}H2 {color: silver;}