[filter:alpha] Can this be done?

[Bootsman123]

If you have a look here:
http://www.schoolsite.greatcorners.com/htmlcss.html

You can see the blue square in the "Orginal". I've used 'filer:alpha(Opacity=50);' in the "Edited" one. Is there a function so I can invert the alpha so that my blue square also looks blue in the "Edited" one.

[Robert Wellock]

It does look blue within any other browser than M$ Explorer because you are using non standard M$ proprietary CSS.

[Bootsman123]

I know it only works with IE 5 and higher, but I just want this to work.