ncrs_Banners = new Array(21);

        ncrs_Banners[0] = "images/nigeriaemble.png";
        ncrs_Banners[1] = "images/logo.png";
        ncrs_Banners[2] = "images/nigeriaemble.png";
        ncrs_Banners[3] = "images/nigeriaemble.png";
        ncrs_Banners[4] = "images/logo.png";
        ncrs_Banners[5] = "images/NigeriaSat1_Satellite.png"; 
        ncrs_Banners[6] = "images/Sat1_Tech_Spec.png"; 

        ncrs_Banners[7] = "images/trans_dt_l.jpg";
        ncrs_Banners[8] = "images/trans_drts_l.jpg"; 
        ncrs_Banners[9] = "images/solareclipse.jpg";   
        ncrs_Banners[10] = "images/sat1_3d.png";
        ncrs_Banners[11] = "images/gradhill_Pic_19.jpg"; 
        ncrs_Banners[12] = "images/gully.gif"; 
        ncrs_Banners[13] = "images/LagosCoastal.png"; 
        ncrs_Banners[14] = "images/nasrda_comps2.jpg"; 
       
        ncrs_Banners[15] = "images/world.jpg"; 
        ncrs_Banners[16] = "images/trees2_small.jpg"; 
        ncrs_Banners[17] = "images/green_yell.jpg"; 
        ncrs_Banners[18] = "images/b_green.jpg"; 

        ncrs_Banners[19] = "images/b_desert.jpg"; 
        ncrs_Banners[20] = "images/bmountain.jpg"; 

       


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

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

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

    
   setTimeout("rotate_banner()", 5 * 4000); 

 
  }