If you have
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
Most of the Browsers will reder the page in standard mode.
IE6 will do as well. But if you have
<?xml version="1.0" encoding="UTF-8"?>
Before the above tag, IE6 will render html in quirk mode.
The solution is using
<meta http-equiv="Content-type" content="text/html; charset=UTF-8" />
instead (put into head tag).
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Feng