一些flex的基本特效。　运用Flash是完全可以做到flex的效果的，为什么还需要flex呢？这里面有两个原因：1：为了迎合更多的developers（开发者）。Flash天生是为了designer（设计者）设计的，界面还有flash的动画概念和程序开发人员格格不入，为了吸引更多的jsp/asp/php等程序员，Macromedia推出了Flex，用非常简单的.mxml来描述界面给jsp/asp/php程序人员使用.(x/d)html非常相似，而且mxml更加规范化、标准化。

-The basic effects of some flex. The use of Flash is fully flex the effects can be done, why need to flex it? This is it there are two reasons: 1: In order to cater to more developers (developers). Flash is born to designer (designer) design, the interface there is flash animation developers incompatible concepts and procedures, in order to attract more jsp/asp/php and other programmers, Macromedia launched Flex, using very simple. Mxml to describe the interface to the jsp/asp/php programmer to use. (x/d) html is very similar, and the mxml more standardization.