Reference:
http://www.xslt.org.cn/books/xslt/index.htm
http://www.xml.com/pub/a/2001/05/07/xsltmath.html
http://www.xml.com/pub/a/2002/06/26/q-a.html
http://blog.csdn.net/cds27/archive/2006/05/21/747283.aspx
http://www.cnblogs.com/cime63/archive/2007/09/28/908754.html
http://stackoverflow.com/questions/231373/xslt-ie6-default-processor
http://shiningwu.javaeye.com/blog/152823
http://shiningwu.javaeye.com/blog/154361