CSS: The Missing Manual

Page Layout Properties

The following properties control the placement and size of elements on a Web page.

bottom

This property is used with absolute, relative, and fixed positioning (see Section A.1.1). When used with absolute or fixed positioning, bottom determines the position of the bottom edge of the style relative to the bottom edge of its closest positioned ancestor. If the styled element isn't inside of any positioned tags, then the placement is relative to the bottom edge of the browser window. You can use this property to place a footnote at the bottom of the browser window. When used with relative positioning, the placement is calculated from the element's bottom edge (prior to positioning). See Section 12.1.2.

• Values: Any valid CSS measurement unit, like pixels, ems, or percentages. Percentages are calculated based on the width of the containing element.

• Example: bottom: 5em;

Note

Internet Explorer 6 and earlier can have a problem when positioning an element using the bottom property. See Section 12.1.4 for details.

clear

Prevents an element from wrapping around a floated element. Instead, the cleared element drops below the bottom of the floated element.

• Values: left, right, both, none. The left option means the element can't wrap around left-floated elements. Similarly, right drops the element below any right-floated items. The both value prevents an element from wrapping around either left-or right-floated elements. None turns the property off, so you use it to override ...