IE6????????????????????????????????
IE6?????DOCUTYPE??????????????????????????????????????????????????????????????????????????????????????????????????XML???????????????????????????????????????????????????????????????
????????????????????????????????????????????XML?????????????????????????????????W3C???????????????????????????????????????XML??????????????????????????UTF-
8 or UTF-16?????????????????????????????XML????????????????????????????????????????????????????????????UTF-8 or 16????????????????????????????????????CSS??????????????????????????????????????????????????????????????????????????????????????????????
????????????????
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">?????????????????
<?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">
