function bana(){
jumpURL = new Array();
imgURL  = new Array();
imgALT  = new Array();
jumpURL[0] = "products/sf7.html";
jumpURL[1] = "products/bkp.html";
jumpURL[2] = "products/cs.html";
jumpURL[3] = "products/ps.html";
jumpURL[4] = "http://www.keitai7.com/";
jumpURL[5] = "products/kensa.html";
jumpURL[6] = "products/rc7.html";
jumpURL[7] = "products/radiator.html";
imgURL[0]  = "images/top_bana_sf7.gif";
imgURL[1]  = "images/top_bana_bkp.gif";
imgURL[2]  = "images/top_bana_cs.gif";
imgURL[3]  = "images/top_bana_ps.gif";
imgURL[4]  = "images/top_bana_keitai7.gif";
imgURL[5]  = "images/top_bana_ken.gif";
imgURL[6]  = "images/top_bana_rc7.gif";
imgURL[7]  = "images/top_bana_rad.gif";
imgALT[0]  = "自動車整備業向けパッケージシステム　スーパーフロントマン7";
imgALT[1]  = "自動車鈑金業向けパッケージシステム　スーパーフロントマンBKパーフェクト";
imgALT[2]  = "車輌販売パッケージシステム　カーステーション";
imgALT[3]  = "リサイクル部品共有在庫　パーツステーションNET";
imgALT[4]  = "携帯電話販売店総合管理システム―携帯7"
imgALT[5]  = "車検・点検支援システム　スーパー検査員"
imgALT[6]  = "リサイクル部品流通ネット向けパッケージ　リサイクル7"
imgALT[7]  = "ラジエータ業界向けパッケージ　ラジエータシステム7"

n = Math.floor(Math.random()*jumpURL.length);
document.write("<a href='"+jumpURL[n]+"'>");
document.write("<img src='"+imgURL[n]+"' border='0' alt='"+imgALT[n]+"' width='230'height='42'>");
document.write("</a>");
}