function detectOpera() {
    var agent = navigator.userAgent.toLowerCase()
    var i=agent.indexOf('opera')
    if (i!=-1) return parseFloat(agent.slice(i+6))
    return false
   }
  var operaVersion= detectOpera()
    if ((operaVersion <= 9.0) && (operaVersion > 0)) {
            document.write ('<link rel=stylesheet type="text/css" href="/styles/opera.css"/>')
    }