wall = new Array();

/* 使用する背景画像を好きなだけ記述 */
wall[0] = "/wp-content/themes/livekids/images/header_bk1.jpg";
wall[1] = "/wp-content/themes/livekids/images/header_bk2.jpg";
wall[2] = "/wp-content/themes/livekids/images/header_bk3.jpg";
wall[3] = "/wp-content/themes/livekids/images/header_bk4.jpg";
wall[4] = "/wp-content/themes/livekids/images/header_bk5.jpg";
wall[5] = "/wp-content/themes/livekids/images/header_bk6.jpg";

rnd = Math.round(Math.random() * (wall.length - 1));
document.write('<style type="text/css">body { background: #FFF url(' , wall[rnd] , ') repeat-x; }</style>');