asp判断用户登录

 function chkLogin(b){
  
  iSiteId = 1
  /*
  if(isNaN(iSiteId)||iSiteId<1){
   // not logined
   if(b){
    // do login
    if(doLogin()) return true;
    else doAlert("","Login.asp?innerUrl="+sUrl);
   }else{
    iSiteId = 0;
    return false;
   }
  }else{
   return true;
  }
  */
  isNaN(iSiteId);
  //doLogin();
  return true;
 }
/*
 function doLogin(){
  var sUID = Str4Sql(Request("UID")+"");
  var sPWD = Str4Sql(Request("PWD")+"");
  var sInnerUrl = Str4Sql(Request("innerUrl")+"");
  if(sUID.length<1||sUID=="undefined") return false;
  sSqlString = "select SiteId,pwd,SiteOpen from t_Site where UID='"+sUID+"'";
  var oRs = oConn.execute(sSqlString);
  if(oRs.EOF) doAlert("用户不存在","Login.asp?innerUrl="+sUrl);
  else if(sPWD!=oRs.fields.item(1).value&&oRs.fields.item(2).value<1) doAlert("密码错误","Login.asp");
  iSiteId = oRs.fields.item(0).value;
  Session("cc_count_6_site_id") = iSiteId;
  if(sInnerUrl&&sInnerUrl!="undefined") doAlert("",sInnerUrl);
  //else doAlert("","Login.asp");
  return true;
 }