Absolute positioning caused the container div to clip the absolute positioned images inside it when filter:alpha(opacity=XX) was applied to the container. I found quite a few other sites complaining about this as well. The solution was on IE6 position a div absolutely and apply the opacity to it, then inside that div specify the image (which may or may not have the PNG filter fix applied).
IE7 supports transparent PNGs, so I was able to forgo the nesting and apply the filter:alpha(opacity=XX) directly to the image. In both cases, the opacity had to be applied to the positioned element, rather than the container. Chad Killingsworth On Jan 7, 11:44 am, bratliff <bratl...@umich.edu> wrote: > Old laptops cannot run Windows XP. Windows 98 cannot run IE7 nor > Chrome. > > The "alpha" filter can control opacity for transparent GIFs but not > for transparent PNGs. IE6 requires the "alphaImageLoader" filter to > display transparent PNGs . It is incompatable with the "alpha" > filter. You can use either one but not both. "absolute postioning" > has nothing to do with it. > > I have updated: > > http://www.polyarc.us/sparsetile.js > > to avoid naming conflicts with the API's OverlayView prototype, also > to hide several support functions. > > The file: > > http://www.polyarc.us/sparse > > demonstrates the use of multiple unrelated tile sets. The WMS "bbox" > parameters are generated automatically. Unfortunately, the USGS OGC > server is frequently unavailable.
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