A co-worker of mine sent me this link. Its a tool that will go through your css code and find any fixes that will be needed for IE6. It’s very useful because many of my clients work in environment that are still using old browsers.
MOSS PNG Fix.
Designing for IE6 means you must consider its lack of support for PNG transparency. There are many PNG hacks out there, I prefer this one from Unit Interactive Labs . The problem with this one is that it has to read through the whole page searching for PNGs to fix which cna make load times noticable slower. I was trying top find a faster solution when I remembered that SharePoint uses PNGs on some of its pages.
On the all items view of most lists Sharepoint uses a png image. Built into the core code is a png fix that allows this image to work in IE6. You can take advantage of the built in png fix by using the following tag:
<asp:Content ContentPlaceHolderId="YourPlaceHolderName" runat="server"> <SharePoint:ViewIcon Width="widthInPx" Height="heightInPx" runat="server"></asp:Content>
The tag will need to be inside of a content placeholder tag. You can name the placeholder whatever you want that makes sense. The placeholder canb be wrapped in a DIV tag for positioning purposes.
The ViewIcon tag will require a width and height to render properly and will not work for background images.