var imgMax = 11; //セットする画像の枚数。
var imgRand = Math.floor(Math.random() * imgMax);
if(imgRand == 0) document.write('
');
else if(imgRand == 1) document.write('
');
else if(imgRand == 2) document.write('
');
else if(imgRand == 3) document.write('
');
else if(imgRand == 4) document.write('
');
else if(imgRand == 5) document.write('
');
else if(imgRand == 6) document.write('
');
else if(imgRand == 7) document.write('
');
else if(imgRand == 8) document.write('
');
else if(imgRand == 9) document.write('
');
else if(imgRand == 10) document.write('
');