如果Adobe Flash不可用，则提供替代图像

问题描述

有没有什么方法提供备用的GIF / PNG图像，以防用户没有安装和/或禁用Adobe Flash。
我发现了一些建议，如W3C的以下内容，它们通过JavaScript确定客户端上是否存在Adobe Flash：

老实说， 非JS 技巧。我正在考虑一些XHTML标签，相当于< noscript> 。 （如< noobject> ，如果对象（在我们的例子中为Flash）不能被显示/加载）。

需要这种分离的原因如下：
我工作的银行最好是以Flash格式显示其横幅。如果不可能，应该显示一个简单的图像。
在过去，它很可能以前面提到的方式解决。我们目前正在进行设计更新，这就是我偶然发现的这段代码，这让我怀疑它是否是最优雅和兼容的方式。

另一个想法让我感到震惊：实际上是否可以在JavaScript禁用的环境中加载Flash对象？

解决方案

 < object classid =clsid：D27CDB6E-AE6D-11cf-96B8-444553540000width =800height =600id =flashContent> 
< param name =movievalue =flash.swf/> 
<！ -  [if！IE]>  - > 
< object type =application / x-shockwave-flashdata =flash.swfwidth =800height =600> 
<！ - <！[endif]  - > 
 <！ -  [if！IE]>  - > 
< / object> 
<！ - <！[endif]  - > 
< / object> 
  

Are there any ways providing an alternate GIF/PNG image, in case the user has no Adobe Flash installed and/or deactivated.I’ve found recommendations, like the following from W3C, which determine via JavaScript the existence of Adobe Flash on the client: W3C Providing alternative images

Honestly, I would prefer a non JS technique. I’m thinking of some XHTML tag, equivalent to <noscript>. (like <noobject> if the object (in our case Flash) can’t be displayed/loaded).

The reason for needing this separation is the following:The bank I’m working for will preferably display their banners in Flash format. In case it isn’t possible a simple image should be shown.In the past it was solved very likely in the way mentioned before. We’re currently working on a design refresh and that’s where I stumbled upon this piece of code which makes me wonder if it’s really the most elegant and compatible way of doing so.

Another idea that strikes me: Is it actually possible to load Flash-objects in a JavaScript disabled environment?

解决方案

Actually having flash installed but javascript turned off is a valid scenario. This should work across most browsers:

<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="800" height="600" id="flashContent">
  <param name="movie" value="flash.swf" />
  <!--[if !IE]>-->
    <object type="application/x-shockwave-flash" data="flash.swf" width="800" height="600">
  <!--<![endif]-->
      <img src="(...)" alt="Put your alternate content here" />
  <!--[if !IE]>-->
    </object>
  <!--<![endif]-->
</object>

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