var Array = new Array("<embed src='p.swf' width='240' height='320'>",
"<embed  src='al.swf' width='240' height='320'>",
"<embed  src='rs.swf' width='240' height='320'>",
"<embed  src='rsa.swf' width='240' height='320'>",
"<embed  src='hr.swf' width='240' height='320'>",
"<embed  src='yi.swf' width='240' height='320'>",
"<embed  src='yz.swf' width='240' height='320'>",
"<embed  src='q.swf' width='240' height='320'>",
"<embed  src='r.swf' width='240' height='320'>",
"<embed  src='s.swf' width='240' height='320'>",
"<embed  src='t.swf' width='240' height='320'>",
"<embed  src='u.swf' width='240' height='320'>",
"<embed  src='v.swf' width='240' height='320'>");

<!--ここの最後の数字はファイル数-->
var File = Array[Math.floor(Math.random()*13)];
document.write(File);