bgimg = new Array();
bgimg[0]="img/bg_01.jpg";
bgimg[1]="img/bg_02.jpg";
bgimg[2]="img/bg_03.jpg";
bgimg[3]="img/bg_04.jpg";
bgimg[4]="img/bg_05.jpg";
bgimg[5]="img/bg_06.jpg";
bgimg[6]="img/bg_07.jpg";
bgimg[7]="img/bg_08.jpg";
bgimg[8]="img/bg_09.jpg";
bgimg[9]="img/bg_10.jpg";
xx = Math.floor(bgimg.length*Math.random());
bgimg = bgimg[Math.floor(xx)];
document.write ('<style type="text/css"><!--body {background-image: url("'+ bgimg +'");background-repeat: no-repeat;background-attachment: fixed;}--></style>');