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（1）构造方式： new Date() new Date(milliseconds) new Date(datestring) new Date(year,month,day,hours,minutes,seconds,ms)，year和month是必需的。 （2）名词解释 UTC : Universal Time GMT : ...

Every JavaScript object has a second JavaScript object (or null, but this is rare) associate with it. This second object is known as a prototype, and the first object inherits properties from the pro...