var back_list = new Array();var backcomment = new Array();back_list[0] = "kotatu_bg01_t.jpg";backcomment[0] = "";back_list[1] = "kotatu_bg02_t.jpg";backcomment[1] = "";back_list[2] = "kotatu_bg03_t.jpg";backcomment[2] = "";back_list[3] = "kotatu_bg04_t.jpg";backcomment[3] = "";back_list[4] = "kotatu_bg05_t.jpg";backcomment[4] = "";back_list[5] = "kotatu_bg06_t.jpg";backcomment[5] = "";back_list[6] = "kotatu_bg07_t.jpg";backcomment[6] = "";back_list[7] = "kotatu_bg08_t.jpg";backcomment[7] = "";back_list[8] = "kotatu_bg09_t.jpg";backcomment[8] = "";back_list[9] = "kotatu_bg10_t.jpg";backcomment[9] = "";back_list[10] = "kotatu_bg11_t.jpg";backcomment[10] = "";back_list[11] = "kotatu_bg12_t.jpg";backcomment[11] = "";back_list[12] = "kotatu_bg13_t.jpg";backcomment[12] = "";back_list[13] = "kotatu_bg14_t.jpg";backcomment[13] = "";back_list[14] = "kotatu_bg15_t.jpg";backcomment[14] = "";