function rimg(){
	topimage=new Array("h1_title_01.jpg","h1_title_02.jpg","h1_title_03.jpg");

        tag1="<img src=\"image/";
        tag2="\" alt=\"イベント・セミナー一覧\" width=\"530\" height=\"120\">";

        i=Math.floor(Math.random()*topimage.length);

	document.write(tag1+topimage[i]+tag2);
}