var r = Math.floor( Math.random() * 120 );
if(r <= 10) {
  document.getElementById('topimage').href = "http://www.janus53.com/~janus/blog/skins/default/css/topimage1.css";
} else if(r <= 20) {
  document.getElementById('topimage').href = "http://www.janus53.com/~janus/blog/skins/default/css/topimage2.css";
} else if(r <= 30) {
  document.getElementById('topimage').href = "http://www.janus53.com/~janus/blog/skins/default/css/topimage3.css";
} else if(r <= 40) {
  document.getElementById('topimage').href = "http://www.janus53.com/~janus/blog/skins/default/css/topimage4.css";
} else if(r <= 50) {
  document.getElementById('topimage').href = "http://www.janus53.com/~janus/blog/skins/default/css/topimage5.css";
} else if(r <= 60) {
  document.getElementById('topimage').href = "http://www.janus53.com/~janus/blog/skins/default/css/topimage6.css";
} else if(r <= 70) {
  document.getElementById('topimage').href = "http://www.janus53.com/~janus/blog/skins/default/css/topimage7.css";
} else if(r <= 80) {
  document.getElementById('topimage').href = "http://www.janus53.com/~janus/blog/skins/default/css/topimage8.css";
} else if(r <= 90) {
  document.getElementById('topimage').href = "http://www.janus53.com/~janus/blog/skins/default/css/topimage9.css";
} else if(r <= 100) {
  document.getElementById('topimage').href = "http://www.janus53.com/~janus/blog/skins/default/css/topimage10.css";
} else if(r <= 110) {
  document.getElementById('topimage').href = "http://www.janus53.com/~janus/blog/skins/default/css/topimage11.css";
} else {
  document.getElementById('topimage').href = "http://www.janus53.com/~janus/blog/skins/default/css/topimage12.css";
}