How to Use CSS to make PNG images transparent

Perhaps this was a very simple problem. Although I did not focus on CSS, I also learned how to accumulate permissions.CodeTo achieve PNG transparency

 

  <  Style  Type  = "Text/CSS"  >  
# Yes  {  
Margin  : 0 auto  ;  
Text-indent  :  -9999em  ;  
Width  :  362  ;  
Height  : 139  ;  
Background-Image  :  URL (images/2009_mayday.png)  ;  
Background-repeat  :  No-repeat  ;  
Background-Position :  Left  ;  
_ Background  :  None  ;  
_ Filter  :  Progid: DXImageTransform. Microsoft. alphaimageloader (src = "http://k.baobaoke.com/images/2009_mayday.png", sizingmethod = "scale ") ;  
  }  
  </  Style  >  

.....
  <  H1  ID  = "Yes"     > </  H1  > 

 

A few guesses:

 

Because IE6 is a very personalized browser, PNG images do not support transparency, so they must be implemented using filters.

For the effect of this filter, Google it. Hey.