var cssurl= new Array();
cssurl[0]="css/ito.css";
cssurl[1]="css/josh.css";
cssurl[2]="css/kitaoka.css";
cssurl[3]="css/arai.css";
cssurl[4]="css/kondo.css";
cssurl[5]="css/kanai.css";
cssurl[6]="css/toryu.css";
cssurl[7]="css/oishi.css";
cssurl[8]="css/kawamura.css";
cssurl[9]="css/windy.css";
cssurl[10]="css/hikaru.css";
cssurl[11]="css/daisuke.css";

n= Math.floor(Math.random()*cssurl.length);
document.write("<link rel='stylesheet' type='text/css' href='"+cssurl[n]+"'>");