語法如下：var t = type(obj);使用舉例如下：var?t?=?type(1)?//?t==="number"var?t?=?type(new?Number(1))?//?t==="number"var?t?=?type("abc")?//?t==="string"var?t?=?type(new?String("abc"))?//?t==="string"var?t?=?type(true)?//?t==="boolean"var?t?=?type(undefined)?//?t==="undefined"var?t?=?type(null)?//?t==="null"var?t?=?type({})?//?t==="object"var?t?=?type([])?//?t==="array"var?t?=?type(new?Date)?//?t==="date"var?t?=?type(/\d/)?//?t==="regexp"var?t?=?type(function(){})?//?t==="function"