nasrda_Banners = new Array(21);

        nasrda_Banners[0] = "pictures/AbujaDTM.jpg";
        nasrda_Banners[1] = "pictures/NigeriaSat1_FCT.jpg";
        nasrda_Banners[2] = "pictures/ZumaRock.png";
        nasrda_Banners[3] = "pictures/antena4.jpg";
        nasrda_Banners[4] = "pictures/nigeriasat1.jpg";
        nasrda_Banners[5] = "pictures/NigeriaSat1_Satellite.png"; 
        nasrda_Banners[6] = "pictures/Sat1_Tech_Spec.png"; 

        nasrda_Banners[7] = "pictures/trans_dt_l.png";
        nasrda_Banners[8] = "pictures/trans_drts_l.jpg"; 
        nasrda_Banners[9] = "pictures/nigcomsat.png";   
        nasrda_Banners[10] = "pictures/sat1_3d.png";
        nasrda_Banners[11] = "pictures/sat2_coming.png"; 
        nasrda_Banners[12] = "pictures/Sat1_Launch.jpg"; 
        nasrda_Banners[13] = "pictures/LagosCoastal.png"; 
        nasrda_Banners[14] = "pictures/Sat1_Launch2.jpg"; 
       
        nasrda_Banners[15] = "pictures/world.jpg"; 
        nasrda_Banners[16] = "pictures/admin_building.png"; 
        nasrda_Banners[17] = "pictures/Sat2_c_model.jpg"; 
        nasrda_Banners[18] = "pictures/nigcomsat.png"; 

        nasrda_Banners[19] = "pictures/NigeriaSat1_FCT.jpg"; 
        nasrda_Banners[20] = "pictures/Sat_small_model.png"; 

       


   var current_banner = 0;
   var no_of_banners =  nasrda_Banners.length;

function rotate_banner()
{
    
  
  if (current_banner == no_of_banners)
     {
      current_banner = 0;
     }

     document.nbanner.src = nasrda_Banners[current_banner];  
     current_banner++ ; 

    
   setTimeout("rotate_banner()", 5 * 5000); 

 
  }