function randInt(min,max)
{
     var div = (max - min) + 1
     var randNum = Math.random()
     for (var i = 0; i <= div - 1; i++)
     {
          if (randNum >= i / div && randNum < (i+1) / div)
          {return i + min}
     }
}

var abc = randInt(1,13);
if (abc == 1) {
     document.write(" <img src=\"images/landingbanners/aftac.jpg\" width=\"546\" height=\"105\" alt=\"Turbofan Exhaust\" border=\"0\" align=\"bottom\" /> ");
}

if (abc == 2) {
     document.write(" <img src=\"images/landingbanners/aviators.jpg\" width=\"546\" height=\"105\" alt=\"Aviators\" border=\"0\" align=\"bottom\" /> ");
}

if (abc == 3) {
     document.write(" <img src=\"images/landingbanners/er2.jpg\" width=\"546\" height=\"105\" alt=\"NASA ER-2\" border=\"0\" align=\"bottom\" /> ");
}

if (abc == 4) {
     document.write(" <img src=\"images/landingbanners/hale.jpg\" width=\"546\" height=\"105\" alt=\"NASA HALE\" border=\"0\" align=\"bottom\" /> ");
}

if (abc == 5) {
     document.write(" <img src=\"images/landingbanners/liftingbody.jpg\" width=\"546\" height=\"105\" alt=\"Lifting Body\" border=\"0\" align=\"bottom\" /> ");
}

if (abc == 6) {
     document.write(" <img src=\"images/landingbanners/turbo.jpg\" width=\"546\" height=\"105\" alt=\"Turbomachinery\" border=\"0\" align=\"bottom\" /> ");
}

if (abc == 7) {
     document.write(" <img src=\"images/landingbanners/uav.jpg\" width=\"546\" height=\"105\" alt=\"UAV\" border=\"0\" align=\"bottom\" /> ");
}

if (abc == 8) {
     document.write(" <img src=\"images/landingbanners/vstol.jpg\" width=\"546\" height=\"105\" alt=\"VSTOL\" border=\"0\" align=\"bottom\" /> ");
}

if (abc == 9) {
     document.write(" <img src=\"images/landingbanners/programs_fap2.jpg\" width=\"546\" height=\"105\" alt=\"Civil Tiltrotor\" border=\"0\" align=\"bottom\" /> ");
}

if (abc == 10) {
     document.write(" <img src=\"images/landingbanners/programs_asp.jpg\" width=\"546\" height=\"105\" alt=\"Airspace Systems\" border=\"0\" align=\"bottom\" /> ");
}

if (abc == 11) {
     document.write(" <img src=\"images/landingbanners/programs_atp.jpg\" width=\"546\" height=\"105\" alt=\"Aeronautics Test Program\" border=\"0\" align=\"bottom\" /> ");
}

if (abc == 12) {
     document.write(" <img src=\"images/landingbanners/technical_excellence_banner.jpg\" width=\"546\" height=\"105\" alt=\"Technical Excellence\" border=\"0\" align=\"bottom\" /> ");
}

if (abc == 13) {
     document.write(" <img src=\"images/landingbanners/morphing_wing_aircraft.jpg\" width=\"546\" height=\"105\" alt=\"Morphing Wing Aircraft\" border=\"0\" align=\"bottom\" /> ");
}