/* ----------------------------------------------------------------------------------------------------
   セミナー写真
---------------------------------------------------------------------------------------------------- */

/* 最初のセミナー写真をランダム表示
---------------------------------------------------------------------------------------------------- */
function loadSeminar() {
	var TOTAL = 4;
	var num = Math.floor(Math.random()*TOTAL) + 1;
	changeSeminar(num);
}

/* セミナー写真を切り替える
---------------------------------------------------------------------------------------------------- */
function changeSeminar(num) {
	var seminar = document.getElementById("seminar");
	seminar.style.backgroundImage = "url(images/seminar_ph00"+num+".jpg)";
}


/* ----------------------------------------------------------------------------------------------------
   イベント
---------------------------------------------------------------------------------------------------- */
window.onload = loadSeminar;