css - position Property(absolute vs relative)

CSS Syntax

position: static|absolute|fixed|relative|initial|inherit;

Property Values

Value	Description	Play it
static	Default value. Elements render in order, as they appear in the document flow	Play it »
absolute	The element is positioned relative to its first positioned (not static) ancestor element	Play it »
fixed	The element is positioned relative to the browser window	Play it »
relative	The element is positioned relative to its normal position, so "left:20" adds 20 pixels to the element's LEFT position	Play it »
initial	Sets this property to its default value. Read about initial	Play it »
inherit	Inherits this property from its parent element. Read about inherit

source - http://www.w3schools.com/cssref/pr_class_position.asp

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absolute는 조상요소가 relative가 아니면 fixed와 동일하게 위치됨?