dynamically controlling alpha property

[LittleRed]

is there any way to control alpha/transparency levels dynamically? I'd like to get an image fading in to about 50% transparency, moving across the background image and fading out again.

what level of browser support is there for the .png format to use the alpha channel in that?

...or am I just going to have to do it in Flash?

cheers

[Fang]

1) No.
2)PNG support (http://www.graphicswiz.com/png/pngapbr.html). Partial solution (http://support.microsoft.com/default.aspx?scid=kb;en-us;265221)
3)Probably

[LittleRed]

thanks Fang, I think Flash it is.

[SnowCrash]

Hi
you can also use CSS together with JavaScript:

Ie:
CSS: .Obj {filter: alpha(opacity = 0);}
JS: Obj.filters.alpha.opacity = Opacity;

Mozilla/Netscape:
CSS: .Obj {-moz-opacity: 0;}
JS: Obj.style.MozOpacity = Opacity + "%";