function checkId(userId){
    //判断浏览者是否安装了贸易通
    if (NewCheckAlitalkInstalled()){
        window.location = "Alitalk:SendIM?"+userId;
    }else{
        //提示安装贸易通
        window.target="_blank";
        window.open("http://china.alibaba.com/community/turbine/template/community%2CATCPromotionDown");
    }
}

function NewCheckAlitalkInstalled() {
  var obj;
  try {
  obj = new ActiveXObject("AlitalkSetup.Install");
  }
  catch(e) {
  }
  if (null!=obj) {
    return true;
  }
  else {
    return false;
  }
}