JavaScript's clock implementation

In JavaScript, there is a built-in object date, and its important role is to implement time-of-day updates, creating a real timetable through code.

<! DOCTYPE html>
Browser Display effect:
If the display in the browser is not a positive circle, because of the CSS3 fillet effect problem, because many browsers are selfish, set too many private properties, so long as the CSS3 tag in front of the browser with its own private prefix can be, here gives the front end need to test the top 5 browser prefix , as long as the 5 big browsers passed, the others are no problem.
JavaScript's clock implementation