IE6和IE7都可以触发的(在XHTML 的DTD申明前加上HTML注释):
<!--Let ie6 and ie7 into quirks mode-->
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
IE6的触发(在XHTML 的DTD申明前加上XML申明):
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">