DOCBOOK-APPS: funcsynopsis + ansi style - different render withhtmlhelp and xhtml

I have placed funcsynopsis in my document. I found ansi style specified with
parameter funcsynopsis.style more readable for my document and decided to use
it. But this parameter influence only htmlhelp render. It looks the same as kr
style when rendered to html. Any advice ?

here is my customization

common:
  <xsl:param name="generate.section.toc.level">1</xsl:param>
  <xsl:param name="section.autolabel">1</xsl:param>
  <xsl:param name="section.label.includes.component.label">1</xsl:param>
  <xsl:param name="generate.index">1</xsl:param>
  <xsl:param name="funcsynopsis.style">ansi</xsl:param>

for htmlhelp:
  <xsl:import href="/docbook/walsh/xsl/htmlhelp/htmlhelp.xsl"/>
  <xsl:import href="common.xsl"/>
  <xsl:param name="htmlhelp.hhc.show.root">0</xsl:param>
  <xsl:param name="htmlhelp.use.hhk">1</xsl:param>

for xhtml:
  <xsl:import href="/docbook/walsh/xsl/xhtml/docbook.xsl"/>
  <xsl:import href="common.xsl"/>

Wlodzimierz Skiba