Accepted and Non-accepted HTML in External HTML file?

[size=1]I am attempting to load an external HTML .txt file, but I need to know what HTML code Flash will accept and what it will not. I am applying a CSS stylesheet, but I[/size] [size=1]believe I have that all worked out by referring to what I’ve learned from the[/size] “[size=1][color=black]Applying[/color][/size][size=1][color=black][font=Verdana] CSS to Externally Loaded Text” tutorial[/font][font=Verdana] [/font][font=Verdana]by Snehal Trivedi. By the way, appreciate that tutorial very much! [/font][/color][/size]
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[size=1]Look forward to any feedback![/size]
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[size=1]Wallyhawk[/size]