if(document.images) {
 var imgs = new Array();
 imgs[0] = new Image();  imgs[0].src = "images/irasuto6_01.gif"; 
 imgs[1] = new Image();  imgs[1].src = "images/irasuto7_01.gif";
 imgs[2] = new Image();  imgs[2].src = "images/irasuto6_03.gif";
 imgs[3] = new Image();  imgs[3].src = "images/irasuto7_03.gif";
 imgs[4] = new Image();  imgs[4].src = "images/irasuto6_05.gif";
 imgs[5] = new Image();  imgs[5].src = "images/irasuto7_05.gif";
 imgs[6] = new Image();  imgs[6].src = "images/irasuto6_15.gif";
 imgs[7] = new Image();  imgs[7].src = "images/irasuto7_15.gif";
 imgs[8] = new Image();  imgs[8].src = "images/irasuto6_09.gif";
 imgs[9] = new Image();  imgs[9].src = "images/irasuto7_09.gif";
 imgs[10] = new Image();  imgs[10].src = "images/irasuto6_11.gif";
 imgs[11] = new Image();  imgs[11].src = "images/irasuto7_11.gif";
 imgs[12] = new Image();  imgs[12].src = "images/irasuto6_13.gif";
 imgs[13] = new Image();  imgs[13].src = "images/irasuto7_13.gif";
 imgs[14] = new Image();  imgs[14].src = "../../common/bt_ichiran.gif"; 
 imgs[15] = new Image();  imgs[15].src = "../../common/bt_ichiran2.gif";
 imgs[16] = new Image();  imgs[16].src = "../../common/bt_shitumon.gif"; 
 imgs[17] = new Image();  imgs[17].src = "../../common/bt_shitumon2.gif";
 imgs[18] = new Image();  imgs[18].src = "../../common/bt_nigari.gif";
 imgs[19] = new Image();  imgs[19].src = "../../common/bt_nigari2.gif";
 imgs[20] = new Image();  imgs[20].src = "../../common/bt_okaidoku.gif";
 imgs[21] = new Image();  imgs[21].src = "../../common/bt_okaidoku2.gif";
 imgs[22] = new Image();  imgs[22].src = "../../common/bt_mail.gif";
 imgs[23] = new Image();  imgs[23].src = "../../common/bt_mail2.gif";
 imgs[24] = new Image();  imgs[24].src = "../../common/bt_company.gif"; 
 imgs[25] = new Image();  imgs[25].src = "../../common/bt_company2.gif"; 
}
function rollOver(id, imgname) {
document.images[id].src = imgs[imgname].src;
}