function topGirl(gID,gName){
  this.gID = gID;
  this.gName = gName;
}

var a = new Array(
new topGirl('kinosakimomo','城崎もも'),
new topGirl('sonobemisuzu','園部みすず'),
new topGirl('kurosawachiaki','黒澤ちあき'),
new topGirl('arimuramiyu','有村みゆ'),
new topGirl('ayanamiruka','綾波ルカ'),
new topGirl('yamamotoyukari','山本ゆかり')
);

function topImagesRandom(a){
  var s = new String();
  var aGirl = a[Math.floor(Math.random()*a.length)];
  //s += '<img src="http://www.yk-bully.com/images/topimages/'+aGirl.gID+'.jpg" width="540" height="230">';
  s += '<a href="/zaiseki/'+aGirl.gID+'/"><img src="http://www.yk-bully.com/images/topimages/'+aGirl.gID+'.jpg" width="540" height="310"></a>';
  document.write(s);
}