function open_new_window(number) 
    {
      switch (number)
      {
        case 1:
          dlg = window.open ("http://www.fedex.com/" ,"NewWindowName");break;
        case 2:
          dlg = window.open ("http://www.dhl.com" ,"NewWindowName");break;
        case 3:
          dlg = window.open ("http://www.speedex.gr" ,"NewWindowName");break;
        case 4:
          dlg = window.open ("http://www.ups.com" ,"NewWindowName");break;
        case 5:
          dlg = window.open ("http://www.acscourier.gr" ,"NewWindowName");break;
        case 6:
          dlg = window.open ("http://www.eett.gr" ,"NewWindowName");break;
        default:
          dlg = window.open ("http://stest/taxydromiki" ,"NewWindowName");break;
      }  
    }