function banner1() {
banner = new Array();
banner[0]="http://www.seibu-bansetsu.com/js/banner/img/gallery/01.png";
banner[1]="http://www.seibu-bansetsu.com/js/banner/img/gallery/02.png";
banner[2]="http://www.seibu-bansetsu.com/js/banner/img/gallery/03.png";
banner[3]="http://www.seibu-bansetsu.com/js/banner/img/gallery/04.png";
banner[4]="http://www.seibu-bansetsu.com/js/banner/img/gallery/05.png";
banner[5]="http://www.seibu-bansetsu.com/js/banner/img/gallery/06.png";
banner[6]="http://www.seibu-bansetsu.com/js/banner/img/gallery/07.png";
banner[7]="http://www.seibu-bansetsu.com/js/banner/img/gallery/08.png";
banner[8]="http://www.seibu-bansetsu.com/js/banner/img/gallery/09.png";
banner[9]="http://www.seibu-bansetsu.com/js/banner/img/gallery/10.png";
banner[10]="http://www.seibu-bansetsu.com/js/banner/img/gallery/11.png";
banner[11]="http://www.seibu-bansetsu.com/js/banner/img/gallery/12.png";
banner[12]="http://www.seibu-bansetsu.com/js/banner/img/gallery/13.png";
banner[13]="http://www.seibu-bansetsu.com/js/banner/img/gallery/14.png";
banner[14]="http://www.seibu-bansetsu.com/js/banner/img/gallery/15.png";
banner[15]="http://www.seibu-bansetsu.com/js/banner/img/gallery/16.png";
banner[16]="http://www.seibu-bansetsu.com/js/banner/img/gallery/17.png";
banner[17]="http://www.seibu-bansetsu.com/js/banner/img/gallery/18.png";
banner[18]="http://www.seibu-bansetsu.com/js/banner/img/gallery/19.png";
banner[19]="http://www.seibu-bansetsu.com/js/banner/img/gallery/20.png";
banner[20]="http://www.seibu-bansetsu.com/js/banner/img/gallery/21.png";
banner[21]="http://www.seibu-bansetsu.com/js/banner/img/gallery/22.png";
banner[22]="http://www.seibu-bansetsu.com/js/banner/img/gallery/23.png";
alt = new Array();
alt="当社の施工実績を大公開！";
link = new Array();
link= "http://www.seibu-bansetsu.com/gallery/newhouse/wooden/";
rand = Math.floor(Math.random()*banner.length);
document.write("<p><a href="+link+"><img alt="+alt+" src="+banner[rand]+" style='border-style:none'></a></p>");
}


function banner2() {

banner = new Array();
link = new Array();

banner[0]="http://www.seibu-bansetsu.com/js/banner/img/technology/01.png";
banner[1]="http://www.seibu-bansetsu.com/js/banner/img/technology/02.png";
banner[2]="http://www.seibu-bansetsu.com/js/banner/img/technology/03.png";
banner[3]="http://www.seibu-bansetsu.com/js/banner/img/technology/04.png";
banner[4]="http://www.seibu-bansetsu.com/js/banner/img/technology/05.png";
banner[5]="http://www.seibu-bansetsu.com/js/banner/img/technology/06.png";
banner[6]="http://www.seibu-bansetsu.com/js/banner/img/technology/07.png";
banner[7]="http://www.seibu-bansetsu.com/js/banner/img/technology/08.png";
banner[8]="http://www.seibu-bansetsu.com/js/banner/img/technology/09.png";
banner[9]="http://www.seibu-bansetsu.com/js/banner/img/technology/10.png";
banner[10]="http://www.seibu-bansetsu.com/js/banner/img/technology/11.png";
alt = new Array();
alt="家づくりの工法についてご案内";

link[0]= "http://www.seibu-bansetsu.com/technology/ground/improvement1.shtml";
link[1]= "http://www.seibu-bansetsu.com/technology/ground/improvement2.shtml";
link[2]= "http://www.seibu-bansetsu.com/technology/ground/improvement3.shtml";
link[3]= "http://www.seibu-bansetsu.com/technology/ground/improvement4.shtml";
link[4]= "http://www.seibu-bansetsu.com/technology/ground/survey.shtml";
link[5]= "http://www.seibu-bansetsu.com/technology/other/other1.shtml";
link[6]= "http://www.seibu-bansetsu.com/technology/other/other2.shtml";
link[7]= "http://www.seibu-bansetsu.com/technology/other/other4.shtml";
link[8]= "http://www.seibu-bansetsu.com/technology/construction/wooden2.shtml";
link[9]= "http://www.seibu-bansetsu.com/technology/other/other5.shtml";
link[10]= "http://www.seibu-bansetsu.com/technology/other/other6.shtml";

rand = Math.floor(Math.random()*banner.length);
document.write("<p><a href="+link[rand]+"><img alt="+alt+" src="+banner[rand]+" style='border-style:none'></a></p>");
}