function rotatingimages()
{
//72
var ranNum= Math.round(Math.random() * 72);
if (ranNum == 0){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/239/custom/23919_1600x1200-wallpaper-cb1282059531.jpg"; } // img1
if (ranNum == 1){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/210/custom/21069_1600x1200-wallpaper-cb1279132282.jpg"; } // img2
if (ranNum == 2){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/210/custom/21070_1600x1200-wallpaper-cb1275934550.jpg"; } // img3
if (ranNum == 3){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/210/custom/21074_1600x1200-wallpaper-cb1279115263.jpg"; } // img4
if (ranNum == 4){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/210/custom/21087_1600x1200-wallpaper-cb1278012039.jpg"; } // img5
if (ranNum == 5){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/210/custom/21080_1600x1200-wallpaper-cb1276291832.jpg"; } // img6
if (ranNum == 6){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/210/custom/21076_1600x1200-wallpaper-cb1276205884.jpg"; } // img7
if (ranNum == 7){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/210/custom/21075_1600x1200-wallpaper-cb1275934554.jpg"; } // img8
if (ranNum == 8){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/210/custom/21068_1600x1200-wallpaper-cb1278947212.jpg"; } // img9
if (ranNum == 9){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/210/custom/21019_1600x1200-wallpaper-cb1278532492.jpg"; } // img10
if (ranNum == 10){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/210/custom/21024_1600x1200-wallpaper-cb1274989786.jpg"; } // img11
if (ranNum == 11){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/202/custom/20256_1600x1200-wallpaper-cb1273845920.jpg"; } // img12
if (ranNum == 12){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/202/custom/20260_1600x1200-wallpaper-cb1273845912.jpg"; } // img13
if (ranNum == 13){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/202/custom/20261_1600x1200-wallpaper-cb1273845842.jpg"; } // img14
if (ranNum == 14){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/200/custom/20000_1600x1200-wallpaper-cb1273512264.jpg"; } // img15
if (ranNum == 15){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/200/custom/20003_1600x1200-wallpaper-cb1273512199.jpg"; } // img16
if (ranNum == 16){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/200/custom/20007_1600x1200-wallpaper-cb1273512101.jpg"; } // img17
if (ranNum == 17){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/200/custom/20004_1600x1200-wallpaper-cb1276104501.jpg"; } // img18
if (ranNum == 18){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/194/custom/19474_1600x1200-wallpaper-cb1272307008.jpg"; } // img19
if (ranNum == 19){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/199/custom/19993_1600x1200-wallpaper-cb1273512003.jpg"; } // img20
if (ranNum == 20){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/194/custom/19478_1600x1200-wallpaper-cb1272307008.jpg"; } // img21
if (ranNum == 21){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/194/custom/19472_1600x1200-wallpaper-cb1272307079.jpg"; } // img22
if (ranNum == 22){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/194/custom/19477_1600x1200-wallpaper-cb1276018489.jpg"; } // img23
if (ranNum == 23){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/176/custom/17619_1600x1200-wallpaper-cb1269541923.jpg"; } // img24
if (ranNum == 24){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/131/custom/13191_1600x1200-wallpaper-cb1271169144.jpg"; } // img25
if (ranNum == 25){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/107/custom/10775_1600x1200-wallpaper-cb1270737400.jpg"; } // img26
if (ranNum == 26){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/128/custom/12843_1600x1200-wallpaper-cb1268234141.jpg"; } // img27
if (ranNum == 27){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/131/custom/13134_1600x1200-wallpaper-cb1267713397.jpg"; } // img28
if (ranNum == 28){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/131/custom/13130_1600x1200-wallpaper-cb1267713396.jpg"; } // img29
if (ranNum == 29){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/131/custom/13131_1600x1200-wallpaper-cb1268253480.jpg"; } // img30
if (ranNum == 30){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/131/custom/13139_1600x1200-wallpaper-cb1267713398.jpg"; } // img31
if (ranNum == 31){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/126/custom/12664_1600x1200-wallpaper-cb1267713331.jpg"; } // img32
if (ranNum == 32){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/109/custom/10923_1600x1200-wallpaper-cb1267713145.jpg"; } // img33
if (ranNum == 33){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/109/custom/10941_1600x1200-wallpaper-cb1267713152.jpg"; } // img34
if (ranNum == 34){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/109/custom/10949_1600x1200-wallpaper-cb1267713154.jpg"; } // img35
if (ranNum == 35){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/109/custom/10932_1600x1200-wallpaper-cb1267713149.jpg"; } // img36
if (ranNum == 36){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/109/custom/10934_1600x1200-wallpaper-cb1267713150.jpg"; } // img37
if (ranNum == 37){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/109/custom/10931_1600x1200-wallpaper-cb1267713149.jpg"; } // img38
if (ranNum == 38){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/035/custom/3571_1600x1200-wallpaper-cb1267712051.jpg"; } // img39
if (ranNum == 39){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/035/custom/3566_1600x1200-wallpaper-cb1267712049.jpg"; } // img40
if (ranNum == 40){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/037/custom/3741_1600x1200-wallpaper-cb1267712170.jpg"; } // cb1267712170
if (ranNum == 41){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/037/custom/3749_1600x1200-wallpaper-cb1271854488.jpg"; } // cb1271854488
if (ranNum == 42){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/086/custom/8632_1600x1200-wallpaper-cb1267712857.jpg"; } // cb1267712857
if (ranNum == 43){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/086/custom/8606_1600x1200-wallpaper-cb1267712844.jpg"; } // cb1267712844
if (ranNum == 44){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/080/custom/8022_1600x1200-wallpaper-cb1267712771.jpg"; } // cb1267712771
if (ranNum == 45){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/086/custom/8633_1600x1200-wallpaper-cb1267712857.jpg"; } // cb12677128571
if (ranNum == 46){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/080/custom/8021_1600x1200-wallpaper-cb1267712768.jpg"; } // cb1267712768
if (ranNum == 47){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/035/custom/3598_1600x1200-wallpaper-cb1267712071.jpg"; } // cb1267712071
if (ranNum == 48){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/036/custom/3615_1600x1200-wallpaper-cb1267712084.jpg"; } // cb1267712084
if (ranNum == 49){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/036/custom/3610_1600x1200-wallpaper-cb1267712077.jpg"; } // cb1267712077
if (ranNum == 50){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/036/custom/3603_1600x1200-wallpaper-cb1267712073.jpg"; } // cb1267712073
if (ranNum == 51){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/035/custom/3592_1600x1200-wallpaper-cb1267712065.jpg"; } // cb1267712065
if (ranNum == 52){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/035/custom/3589_1600x1200-wallpaper-cb1267712064.jpg"; } // cb1267712064
if (ranNum == 53){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/035/custom/3564_1600x1200-wallpaper-cb1267712048.jpg"; } // cb1267712048
if (ranNum == 54){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/035/custom/3561_1600x1200-wallpaper-cb1267712046.jpg"; } // cb1267712046
if (ranNum == 55){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/035/custom/3533_1600x1200-wallpaper-cb1267712027.jpg"; } // cb1267712027
if (ranNum == 56){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/035/custom/3581_1600x1200-wallpaper-cb1267712058.jpg"; } // cb1267712058
if (ranNum == 57){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/035/custom/3582_1600x1200-wallpaper-cb1267712059.jpg"; } // cb1267712059
if (ranNum == 58){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/035/custom/3585_1600x1200-wallpaper-cb1267712061.jpg"; } // cb1267712061
if (ranNum == 59){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/035/custom/3560_1600x1200-wallpaper-cb1267712046.jpg"; } // cb12677120461
if (ranNum == 60){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/035/custom/3580_1600x1200-wallpaper-cb1267712056.jpg"; } // cb1267712056
if (ranNum == 61){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/035/custom/3573_1600x1200-wallpaper-cb1267712052.jpg"; } // cb1267712052
if (ranNum == 62){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/035/custom/3584_1600x1200-wallpaper-cb1267712060.jpg"; } // cb1267712060
if (ranNum == 63){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/035/custom/3571_1600x1200-wallpaper-cb1267712051.jpg"; } // cb1267712051
if (ranNum == 64){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/037/custom/3761_1600x1200-wallpaper-cb1267712184.jpg"; } // cb1267712184
if (ranNum == 65){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/035/custom/3551_1600x1200-wallpaper-cb1267712039.jpg"; } // cb1267712039
if (ranNum == 66){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/035/custom/3554_1600x1200-wallpaper-cb1267712041.jpg"; } // cb1267712041
if (ranNum == 67){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/037/custom/3745_1600x1200-wallpaper-cb1267712172.jpg"; } // cb1267712172
if (ranNum == 68){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/035/custom/3537_1600x1200-wallpaper-cb1267712029.jpg"; } // cb1267712029
if (ranNum == 69){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/210/custom/21070_1600x1200-wallpaper-cb1275934550.jpg"; } // cb1275934550
if (ranNum == 70){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/036/custom/3682_1600x1200-wallpaper-cb1267712127.jpg"; } // cb1267712127
if (ranNum == 71){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/109/custom/10941_1600x1200-wallpaper-cb1267713152.jpg"; } // cb1267713152
if (ranNum == 72){document.body.background = "http://images.nationalgeographic.com/wpf/media-live/photos/000/109/custom/10932_1600x1200-wallpaper-cb1267713149.jpg"; } // cb1267713149
}