Javascript achieves seamless scrolling compatible with IE and FF_javascript skills

Js achieves seamless rolling and compatible with IEFF. You can take a look. Principle Analysis:
1. First, set the height or width for the container, such as ul, and set ul height to 40px; overflow: hidden;
2. After the height of the container is set, the content height exceeds 40px, and more than half of the content overflows and is hidden. The scrollTop attribute is available. You can use overflow: scroll to view the effect;
3. Change the value of the scrollTop attribute of the container to move the content up or down a node (the principle of scrolling );
4. When scrollTop is greater than or equal to the height of the node to be rolled, set scrollTop to 0, move the first node in the subnode tree to the end, and start rolling again, the effect of continuous loop scrolling appears.
Html source code

The Code is as follows:

Scroll