时间:2013-10-01 23:27:43来源:作者:点击:

Flash is a powerful web technology that achieves a high level of visual impact from the graphical point of view. Unfortunately, it is widely misused in web design. There are still many problems with Flash, especially related to usability and search engine behaviour; we need to thoroughly understand what those problems are before we decide to use Flash for our site.


As with any business decision, it all boils down to understanding what our target audience wants.


If you want to make a big impression from a graphical point of view, Flash is definitely a good approach. However, concrete evidence still points to the fact that most web users utilize the web to find information, and what they regard most important is:


a) quality of content


b) ease of navigation, and


c) speed.



Users also consider the web a highly interactive medium: they are unlikely to watch a computer screen for long periods of time without giving some sort of input.


Flash technology presents several problems that go against the way most people use the web. For example:


  Bandwidth and Load Time Constrains: Sites designed with Flash take a long time to download and consume vast amounts of bandwidth. Not all users have a broadband connection. Flash forces users with dial-up connections to spend valuable time watching the load bar, instead of getting to the information they want, fast.


  Usability Constrains: When you navigate a Flash site designed with a older version, the back button does not work: instead of taking you to the previous screen, it will get you out of the Flash site. Also, the standard colors for visited and unvisited links will not work, and users have no control over the text size they want to use.


  Furthermore, many times Flash sites go against the interactive nature of the web. Since Flash technology favors a "presentation style" approach that resembles television, users are many times reduced to mere observers that get bored after a while, no matter how good the graphics look.

而且,Flash 经常带来网站交互问题。由于Flash支持类似于电视的呈现模式方法,所以用户经常作为观赏者出现。不管画面多么精美,过一段时间,用户就会对内容产生厌烦。

  Search Engine Constrains: Although large search engines like Google now have some Flash indexing capabilities, these are still very limited. You will definetely have a hard time achieving high rankings with a Flash site. One option around this problem is to design a second, search-engine-friendly HTML version of your site. This, though, usually represents an unnecessary expense in both time and money, since in most cases the HTML version alone will get the job done.

搜索引擎的限制:尽管像Google这样的大型搜索引擎,现在具备了对Flash做索引的能力,但搜索内容仍然非常有限,所以Flash网站不会在搜索引擎中获得好的排名。解决这个问题的一种方法是:利用HTML设计网站,这样的网站会有一个好的排名。利用Flash设计网站,会增加不必要的金钱和时间开支,其实 HTML网页就可以完成所有的功能。

Although few, there are some instances when Flash technology can actually be helpful:


a) When you need to show a presentation, for example a demo of your product.


b) To develop interactive games, like those found on sites for kids like Sesame Street, Nickelodeum, or Yahoo! Games.

开发互动游戏时,可以运用Flash,比如:Sesame Street、 Nickelodeum, 、Yahoo! Games等儿童游戏,都使用了Flash

c) When you want to dress up a minimalist site. In this case, a small Flash animation or banner embedded in an HTML document will not consume excessive bandwidth, will load fast, and will enhance the appearance of a bare-bones site.


Although Macromedia (the company that developed Flash) is actively working to improve Flash's usability problems (they even formed a partnership with usability guru Jakob Nielsen in 2002), issues like slow downloads and search engine un-friendliness still remain a problem. Until these issues are addressed and solved, you will be better-off by only using Flash in those rare instances when it actually enhances the value of your content.

尽管,Macromedia(Flash开发公司)正在积极采取方法改善Flash的可用性问题(甚至在2002年组成以网站可用性研究专家Jakob Nielsen为首的工作组,专门研究这个问题),但是下载速度慢、搜索引擎对其不友好的问题,仍然没有解决。在这些问题解决以后,如果利用Flash可以增加网站价值(少数情况),那你可以运用。