Web Development Summary, web development

Web Development Summary, web development
1. <span> the first text <. span> 2. overflow: hidden is out of the parent layer and you have defined the standard-used to remove floating attributes 1. visible: visible beyond Part 2. auto automatically add a scroll bar (especially when adding an image) 3. scroll: it is displayed according to the size of the element on the parent layer. If the size of the child element exceeds the size of the parent element, the scroll bar is automatically added. 4. hidden: hidden beyond part. 3. position attribute: 1 relative layout; top: 0px; left: 30px; (in the original position, move) (any time left and top prevail (when there is a bottom and right )) margin-left: 20px; (total left = 50px) 2. absolute data-to-layout ------ locate from the layer where you are located, the first parent layer that has been located 3. fixed: is the relative location of the HTML frame that can be seen-that is, it will not change the location with the scrolling interface 4. The height (that is, the layer that can be covered) z-index: + number