'清除HTML代码
function clearhtml(content)
  content=replacehtml("&#[^>]*;","",content)
  content=replacehtml("</?marquee[^>]*>","",content)
  content=replacehtml("</?object[^>]*>","",content)
  content=replacehtml("</?param[^>]*>","",content)
  content=replacehtml("</?embed[^>]*>","",content)
  content=replacehtml("</?table[^>]*>","",content)
  content=replacehtml(" ","",content)
  content=replacehtml("</?tr[^>]*>","",content)
  content=replacehtml("</?th[^>]*>","",content)
  content=replacehtml("</?p[^>]*>","",content)
  content=replacehtml("</?a[^>]*>","",content)
  content=replacehtml("</?img[^>]*>","",content)
  content=replacehtml("</?tbody[^>]*>","",content)
  content=replacehtml("</?li[^>]*>","",content)
  content=replacehtml("</?span[^>]*>","",content)
  content=replacehtml("</?div[^>]*>","",content)
  content=replacehtml("</?th[^>]*>","",content)
  content=replacehtml("</?td[^>]*>","",content)
  content=replacehtml("</?script[^>]*>","",content)
  content=replacehtml("(javascript|jscript|vbscript|vbs):","",content)
  content=replacehtml("on(mouse|exit|error|click|key)","",content)
  content=replacehtml("<\\?xml[^>]*>","",content)
  content=replacehtml("<\/?[a-z]+:[^>]*>","",content)
  content=replacehtml("</?font[^>]*>","",content)
  content=replacehtml("</?h[^>]*>","",content)
  content=replacehtml("</?u[^>]*>","",content)
  content=replacehtml("</?i[^>]*>","",content)
  content=replacehtml("</?center[^>]*>","",content)
  content=replacehtml("</?center[^>]*>","",content)
  content=replacehtml("</?nobr[^>]*>","",content)
  content=replacehtml("</?clk[^>]*>","",content)
  content=replacehtml("</?muti[^>]*>","",content)
  content=replacehtml("</?/option[^>]*>","",content)
  content=replacehtml("</?o[^>]*>","",content)
  content=replacehtml("</?strong[^>]*>","",content)
  clearhtml=content
end function

function replacehtml(patrn,strng,content)  
  if isnull(content) then
    content=""
  end if
  set regex=new regexp
  regex.pattern=patrn
  regex.ignorecase=true
  regex.global=true
  replacehtml=regex.replace(content,strng)
end function