var ranimg = new Array();
ranimg[0]="http://brionac.jp/images/headerImage/01.jpg";
ranimg[1]="http://brionac.jp/images/headerImage/02.jpg";
ranimg[2]="http://brionac.jp/images/headerImage/03.jpg";
ranimg[3]="http://brionac.jp/images/headerImage/04.jpg";
ranimg[4]="http://brionac.jp/images/headerImage/05.jpg";
ranimg[5]="http://brionac.jp/images/headerImage/06.jpg";
ranimg[6]="http://brionac.jp/images/headerImage/07.jpg";
ranimg[7]="http://brionac.jp/images/headerImage/08.jpg";
ranimg[8]="http://brionac.jp/images/headerImage/09.jpg";
ranimg[9]="http://brionac.jp/images/headerImage/10.jpg";
ranimg[10]="http://brionac.jp/images/headerImage/11.jpg";
ranimg[11]="http://brionac.jp/images/headerImage/12.jpg";
var mai = Math.floor(ranimg.length*Math.random());
ranimg = ranimg[Math.floor(mai)];
document.writeln('<style type="text/css">'+"\n"+'<!--'+"\n"+'div#all{background:url("'+ ranimg +'") no-repeat right top;}'+"\n"+'-->'+"\n"+'</style>');