资 源 简 介
熟悉JavaScript的数据类型：
数值型、字符型、逻辑型、空值
掌握JavaScript的表达式与运算符
掌握JavaScript控制语句、内部对象
掌握JavaScript自定义对象-Familiar with the JavaScript data types: numeric, character, logic type, null values have JavaScript expressions and operators have JavaScript control statements, internal objects have custom JavaScript object
