How to achieve automatic page up and down effect of the mouse

Take a novel page, you first open the page, and then hold down the middle mouse button on the page, now everyone's mouse has the middle wheel key bar. The mouse without the mouse wheel button is out of print in the market. When you press the wheel key, an icon button appears. As shown in the following illustration:

Appear this circle icon button and then you do not need to click the mouse, only need to drag the mouse to move up and down the effect, press the left mouse button or right key or any key on the keyboard can stop scrolling. Of course, when you click the Move icon button, just move down a little bit, so you do not need to move the mouse to achieve the effect of moving the page down. The farther your mouse icon is from the circle, the faster the scrolling, and the slower it is.

In fact, it is so simple, in addition if you are sharing to everyone, if you are the mouse did not move, the page will appear scrolling situation, then you press the mouse wheel key caused. This is also a lot of novice netizens ignore a detail problem. So now you try the mouse to automatically turn down and turn the effect.