var Array = new Array(
"<img src='s/img1.jpg' width='350' height='326'>",
"<img  src='s/img2.jpg' width='350' height='326'>",
"<img  src='s/img3.jpg' width='350' height='326'>",
"<img  src='s/img4.jpg' width='350' height='326'>",
"<img  src='s/img5.jpg' width='350' height='326'>",
"<img  src='s/img6.jpg' width='350' height='326'>",
"<img  src='s/img7.jpg' width='350' height='326'>",
"<img  src='s/img8.jpg' width='350' height='326'>",
"<img  src='s/img9.jpg' width='350' height='326'>",
"<img  src='s/img10.jpg' width='350' height='326'>",
"<img src='s/img11.jpg' width='350' height='326'>",
"<img  src='s/img12.jpg' width='350' height='326'>",
"<img  src='s/img13.jpg' width='350' height='326'>",
"<img  src='s/img14.jpg' width='350' height='326'>",
"<img  src='s/img15.jpg' width='350' height='326'>",
"<img  src='s/img16.jpg' width='350' height='326'>",
"<img  src='s/img17.jpg' width='350' height='326'>",
"<img  src='s/img18.jpg' width='350' height='326'>",
"<img  src='s/img19.jpg' width='350' height='326'>",
"<img  src='s/img20.jpg' width='350' height='326'>",
"<img src='s/img21.jpg' width='350' height='326'>",
"<img  src='s/img22.jpg' width='350' height='326'>",
"<img  src='s/img23.jpg' width='350' height='326'>",
"<img  src='s/img24.jpg' width='350' height='326'>",
"<img  src='s/img25.jpg' width='350' height='326'>",
"<img  src='s/img26.jpg' width='350' height='326'>",
"<img  src='s/img27.jpg' width='350' height='326'>",
"<img  src='s/img28.jpg' width='350' height='326'>",
"<img  src='s/img29.jpg' width='350' height='326'>",
"<img  src='s/img30.jpg' width='350' height='326'>");

<!--ここの最後の数字はファイル数-->
var File = Array[Math.floor(Math.random()*30)];
document.write(File);