How to use html css to control div or table to be fixed in a specified position

1. z-index: Set the layer to be on the topmost layer.

2. position: fixed; set the positioning.

3. _top: expression(document.body.scrollTop+document.body.clientHeight-this.offsetHeight-6); Control the height of the layer from the top by binding js with css.

Here the control layer is at the bottom, and the specific values ​​are adjusted accordingly according to needs.

4. document.body.scrollTop: body, the scrolling distance of the body tag scroll bar, which can be replaced by other tag objects (with scroll bars).

5. document.body.clientHeight, the height of the body tag, can be replaced with other tag objects.

6, -6, and make corresponding changes according to the specific situation.

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Original URL: http://www.cnblogs.com/skycsdn/archive/2016/06/13/5580009.html