function random_imglink(){
  var footerimages=new Array()
  footerimages[1]="ad/kosatsu.jpg"
  footerimages[2]="ad/kosatsu.jpg"

  var imagelinks=new Array()
  imagelinks[1]="http://www.kosatsu.net/top.shtml"
  imagelinks[2]="http://www.kosatsu.net/top.shtml"

  var ry=Math.floor(Math.random()*footerimages.length)

  if (ry==0)
     ry=1
     document.write('<div style="text-align:center;"><a href='+'"'+imagelinks[ry]+'"'+' title="撮影会情報" target="_blank"><img src="'+footerimages[ry]+'" alt="おすすめサイト情報" width=468" height="80" border="0" /></a></div>')
}

  random_imglink()