/* トップページ画像切り替え */
wall = new Array();
/* 使用する背景画像を好きなだけ記述 */
wall[0] = "/old-archive/img/headbg/headbg_000.jpg";
wall[1] = "/old-archive/img/headbg/headbg_001.jpg";
wall[2] = "/old-archive/img/headbg/headbg_002.jpg";
wall[3] = "/old-archive/img/headbg/headbg_003.jpg";
wall[4] = "/old-archive/img/headbg/headbg_004.jpg";
wall[5] = "/old-archive/img/headbg/headbg_005.jpg";
wall[6] = "/old-archive/img/headbg/headbg_006.jpg";
wall[7] = "/old-archive/img/headbg/headbg_007.jpg";
wall[8] = "/old-archive/img/headbg/headbg_008.jpg";
wall[9] = "/old-archive/img/headbg/headbg_009.jpg";
wall[10] = "/old-archive/img/headbg/headbg_010.jpg";
wall[11] = "/old-archive/img/headbg/headbg_011.jpg";
wall[12] = "/old-archive/img/headbg/headbg_012.jpg";
wall[13] = "/old-archive/img/headbg/headbg_013.jpg";
wall[14] = "/old-archive/img/headbg/headbg_014.jpg";
wall[15] = "/old-archive/img/headbg/headbg_015.jpg";
wall[16] = "/old-archive/img/headbg/headbg_016.jpg";
wall[17] = "/old-archive/img/headbg/headbg_017.jpg";
wall[18] = "/old-archive/img/headbg/headbg_018.jpg";
wall[19] = "/old-archive/img/headbg/headbg_019.jpg";
wall[20] = "/old-archive/img/headbg/headbg_020.jpg";
wall[21] = "/old-archive/img/headbg/headbg_021.jpg";
wall[22] = "/old-archive/img/headbg/headbg_022.jpg";
wall[23] = "/old-archive/img/headbg/headbg_023.jpg";
wall[24] = "/old-archive/img/headbg/headbg_024.jpg";
wall[25] = "/old-archive/img/headbg/headbg_025.jpg";
wall[26] = "/old-archive/img/headbg/headbg_026.jpg";
wall[27] = "/old-archive/img/headbg/headbg_027.jpg";
wall[28] = "/old-archive/img/headbg/headbg_028.jpg";
wall[29] = "/old-archive/img/headbg/headbg_029.jpg";
wall[30] = "/old-archive/img/headbg/headbg_030.jpg";
wall[31] = "/old-archive/img/headbg/headbg_031.jpg";
wall[32] = "/old-archive/img/headbg/headbg_032.jpg";
wall[33] = "/old-archive/img/headbg/headbg_033.jpg";
wall[34] = "/old-archive/img/headbg/headbg_034.jpg";
wall[35] = "/old-archive/img/headbg/headbg_035.jpg";
wall[36] = "/old-archive/img/headbg/headbg_036.jpg";
wall[37] = "/old-archive/img/headbg/headbg_037.jpg";
wall[38] = "/old-archive/img/headbg/headbg_038.jpg";
wall[39] = "/old-archive/img/headbg/headbg_039.jpg";
wall[40] = "/old-archive/img/headbg/headbg_040.jpg";
wall[41] = "/old-archive/img/headbg/headbg_041.jpg";
wall[42] = "/old-archive/img/headbg/headbg_042.jpg";
wall[43] = "/old-archive/img/headbg/headbg_043.jpg";
wall[44] = "/old-archive/img/headbg/headbg_044.jpg";
wall[45] = "/old-archive/img/headbg/headbg_045.jpg";
wall[46] = "/old-archive/img/headbg/headbg_046.jpg";
wall[47] = "/old-archive/img/headbg/headbg_047.jpg";
wall[48] = "/old-archive/img/headbg/headbg_048.jpg";
wall[49] = "/old-archive/img/headbg/headbg_049.jpg";
wall[50] = "/old-archive/img/headbg/headbg_050.jpg";
wall[51] = "/old-archive/img/headbg/headbg_051.jpg";
wall[52] = "/old-archive/img/headbg/headbg_052.jpg";
wall[53] = "/old-archive/img/headbg/headbg_053.jpg";
wall[54] = "/old-archive/img/headbg/headbg_054.jpg";
wall[55] = "/old-archive/img/headbg/headbg_055.jpg";
wall[56] = "/old-archive/img/headbg/headbg_056.jpg";
wall[57] = "/old-archive/img/headbg/headbg_057.jpg";
wall[58] = "/old-archive/img/headbg/headbg_058.jpg";
wall[59] = "/old-archive/img/headbg/headbg_059.jpg";
wall[60] = "/old-archive/img/headbg/headbg_060.jpg";
wall[61] = "/old-archive/img/headbg/headbg_061.jpg";
wall[62] = "/old-archive/img/headbg/headbg_062.jpg";
wall[63] = "/old-archive/img/headbg/headbg_063.jpg";
wall[64] = "/old-archive/img/headbg/headbg_064.jpg";
wall[65] = "/old-archive/img/headbg/headbg_065.jpg";
wall[66] = "/old-archive/img/headbg/headbg_066.jpg";
wall[67] = "/old-archive/img/headbg/headbg_067.jpg";
wall[68] = "/old-archive/img/headbg/headbg_068.jpg";
wall[69] = "/old-archive/img/headbg/headbg_069.jpg";
wall[60] = "/old-archive/img/headbg/headbg_060.jpg";
wall[71] = "/old-archive/img/headbg/headbg_071.jpg";
wall[72] = "/old-archive/img/headbg/headbg_072.jpg";
wall[73] = "/old-archive/img/headbg/headbg_073.jpg";
wall[74] = "/old-archive/img/headbg/headbg_074.jpg";
wall[75] = "/old-archive/img/headbg/headbg_075.jpg";

rnd = Math.round(Math.random() * (wall.length - 1));
document.write('<style type="text/css">#mainheadbg { background-image:url(',wall[rnd],'); }</style>');