function top_img_blog1(){
ca = new Array();
ca[0] = 'http://www.kaketeko.com/images/title_blog1.jpg';
ca[1] = 'http://www.kaketeko.com/images/title_blog1a.jpg';
ca[2] = 'http://www.kaketeko.com/images/title_blog1b.jpg';

p = Math.round(Math.random() * 2); //�摜�̖���-1
document.write('<img src="' +ca[p]+ '" width="770" height="110" >');
}