function rndBG() {
var bg0="/galleries/miraka-pirate-ship-pictures/thumbnails/s1.jpg";
var bg1="/galleries/miraka-pirate-ship-pictures/thumbnails/s2.jpg";
var bg2="/galleries/miraka-pirate-ship-pictures/thumbnails/s3.jpg";
var bg3="/galleries/miraka-pirate-ship-pictures/thumbnails/s4.jpg";
var bg4="/galleries/miraka-pirate-ship-pictures/thumbnails/s5.jpg";
var bg5="/galleries/miraka-pirate-ship-pictures/thumbnails/s6.jpg";
var bg6="/galleries/miraka-pirate-ship-pictures/thumbnails/s7.jpg";
var bg7="/galleries/miraka-pirate-ship-pictures/thumbnails/s8.jpg";
var bg8="/galleries/miraka-pirate-ship-pictures/thumbnails/s9.jpg";
var bg9="/galleries/miraka-pirate-ship-pictures/thumbnails/s10.jpg";
var bg10="/galleries/miraka-pirate-ship-pictures/thumbnails/s11.jpg";
var bg11="/galleries/miraka-pirate-ship-pictures/thumbnails/s12.jpg";
var bg12="/galleries/miraka-pirate-ship-pictures/thumbnails/s13.jpg";
var bg13="/galleries/miraka-pirate-ship-pictures/thumbnails/s14.jpg";
var bg14="/galleries/miraka-pirate-ship-pictures/thumbnails/s15.jpg";
var bg15="/galleries/miraka-pirate-ship-pictures/thumbnails/s16.jpg";
var bg16="/galleries/miraka-pirate-ship-pictures/thumbnails/s17.jpg";

var bgr0="/galleries/miraka-tallship-restoration/thumbnails/s1.jpg";
var bgr1="/galleries/miraka-tallship-restoration/thumbnails/s2.jpg";
var bgr2="/galleries/miraka-tallship-restoration/thumbnails/s3.jpg";
var bgr3="/galleries/miraka-tallship-restoration/thumbnails/s4.jpg";
var bgr4="/galleries/miraka-tallship-restoration/thumbnails/s5.jpg";
var bgr5="/galleries/miraka-tallship-restoration/thumbnails/s6.jpg";
var bgr6="/galleries/miraka-tallship-restoration/thumbnails/s7.jpg";
var bgr7="/galleries/miraka-tallship-restoration/thumbnails/s8.jpg";
var bgr8="/galleries/miraka-tallship-restoration/thumbnails/s9.jpg";
var bgr9="/galleries/miraka-tallship-restoration/thumbnails/s10.jpg";
var bgr10="/galleries/miraka-tallship-restoration/thumbnails/s11.jpg";
var bgr11="/galleries/miraka-tallship-restoration/thumbnails/s12.jpg";
var bgr12="/galleries/miraka-tallship-restoration/thumbnails/s13.jpg";
var bgr13="/galleries/miraka-tallship-restoration/thumbnails/s14.jpg";
var bgr14="/galleries/miraka-tallship-restoration/thumbnails/s15.jpg";
var bgr15="/galleries/miraka-tallship-restoration/thumbnails/s16.jpg";
var bgr16="/galleries/miraka-tallship-restoration/thumbnails/s17.jpg";

var cur=Math.round(17*Math.random());
if (cur<1) {
  bg=bg0;
  bgr=bgr0;
} else if (cur<=2) {
  bg=bg1
  bgr=bgr1;
} else if (cur<=3) {
  bg=bg2
  bgr=bgr2;
} else if (cur<=4) {
  bg=bg3
  bgr=bgr3;
} else if (cur<=5) {
  bg=bg4
  bgr=bgr4;
} else if (cur<=6) {
  bg=bg5
  bgr=bgr5;
} else if (cur<=7) {
  bg=bg6
  bgr=bgr6;
} else if (cur<=8) {
  bg=bg7
  bgr=bgr7;
} else if (cur<=9) {
  bg=bg8
  bgr=bgr8;
} else if (cur<=10) {
  bg=bg9
  bgr=bgr9;
} else if (cur<=11) {
  bg=bg10
  bgr=bgr10;
} else if (cur<=12) {
  bg=bg11
  bgr=bgr11;
} else if (cur<=13) {
  bg=bg12
  bgr=bgr12;
} else if (cur<=14) {
  bg=bg13
  bgr=bgr13;
} else if (cur<=15) {
  bg=bg14
  bgr=bgr14;
} else if (cur<=16) {
  bg=bg15
  bgr=bgr15;
} else {
  bg=bg16
  bgr=bgr16;
}
//eval('document.getElementById("navpic").style.backgroundImage="url('+bg+')"');
eval('document.getElementById("navpic").style.backgroundImage="url('+bg+')"');
eval('document.getElementById("navpic2").style.backgroundImage="url('+bgr+')"');
}