Targeting + ###. 1. 4
#### positioning position
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** Static positioning (positioning the document flow) ** default: static, block elements are arranged from top to bottom, from left to right within a row of elements, by controlling the position of an element outside the element.
- relative positioning: relative , without departing from the document flow element, by left / right / top / bottom positions shifted from the element do an initial position
when a need to change the position of the element, and the other elements of the case of using relative positioning unaffected -
Absolute,: absolute positioning element from the document flow through the left / right / top bottom moving element, the element coordinates relative to the window (the default) or to an upper level element /
using absolute when the element needs to be changed position, and does not want to keep the original position locate
- fixed positioning: fixed, the element from the document flow through the left / right / top bottom moving element, the element coordinates with respect to only / window.
When using a fixed element positioned at a required position of a window is fixed
#### float position
- From the document flow, floating elements from the current line to the left or to the right, hit the stop when the parent element borders or other floating elements
- Float line fit will automatically wrap, line feed is likely to be the main card
- When other elements above the floating element will go on top of the element, if the element is moved up undesirable attribute can be added to the clear element.
- When all child elements all floating, automatic identification of a height of 0, by adding elements to the overflow: hidden resolve this problem.
- Margin position by the control element
- When it is desired to change the transverse elements arranged longitudinally floating targeting
### disposed overflow overflows - hidden: out of range does not show
- visible (default): out of range display
- scroll: scroll out of range