function headBanner(){

var b = new Array(

// 以下にバナー部分のHTMLをシングルクォーテーション「'」で括って記入。最後の要素以外には、末尾にカンマ「,」を付加。

'<a href="fair/55kamaka.html"><img src="share/fair_images/Sbanner728x90_55.jpg" alt="Kamaka Ukulele Custom Shop Collection" width="728" height="90" border="0" /></a>',
'<a href="fair/32_b.html"><img src="share/fair_images/Sbanner728x90_32b.jpg" alt="サムライ・ベース 其の二" width="728" height="90" border="0" /></a>',
'<a href="fair/53ukulele.html"><img src="share/fair_images/Sbanner728x90_53.jpg" alt="マーティン・ウクレレの魅力とモデル比較" width="728" height="90" border="0" /></a>',
'<a href="fair/05_1.html"><img src="share/fair_images/Sbanner728x90_05.jpg" alt="リッケンバッカー研究室!" width="728" height="90" border="0" /></a>',
'<a href="fair/11.html"><img src="share/fair_images/Sbanner728x90_11.jpg" alt="Gibson フラット・トップ・アコースティック・ギター" width="728" height="90" border="0" /></a>',
'<a href="fair/22_b.html"><img src="share/fair_images/Sbanner728x90_22b.jpg" alt="-メンテナンス初級編-" width="728" height="90" border="0" /></a>',
'<a href="fair/24_a.html"><img src="share/fair_images/Sbanner728x90_24.jpg" alt="ギター初心者雑学書" width="728" height="90" border="0" /></a>',
'<a href="fair/27.html"><img src="share/fair_images/Sbanner728x90_27.jpg" alt="THE中古楽器屋秘蔵楽器“蔵出し”徹底解説" width="728" height="90" border="0" /></a>',
'<a href="fair/28.html"><img src="share/fair_images/Sbanner728x90_28.jpg" alt="マイク買取ります!!" width="728" height="90" border="0" /></a>',
'<a href="fair/29_a.html"><img src="share/fair_images/Sbanner728x90_29a.jpg" alt="初めての楽器選び" width="728" height="90" border="0" /></a>',
'<a href="fair/29_b.html"><img src="share/fair_images/Sbanner728x90_29b.jpg" alt="初めての楽器選び" width="728" height="90" border="0" /></a>',
'<a href="fair/29_c.html"><img src="share/fair_images/Sbanner728x90_29c.jpg" alt="初めての楽器選び" width="728" height="90" border="0" /></a>',
'<a href="fair/29_d.html"><img src="share/fair_images/Sbanner728x90_29d.jpg" alt="初めての楽器選び" width="728" height="90" border="0" /></a>',
'<a href="fair/29_e.html"><img src="share/fair_images/Sbanner728x90_29e.jpg" alt="初めての楽器選び" width="728" height="90" border="0" /></a>',
'<a href="fair/29_f01.html"><img src="share/fair_images/Sbanner728x90_29f.jpg" alt="初めての楽器選び" width="728" height="90" border="0" /></a>',
'<a href="fair/31.html"><img src="share/fair_images/Sbanner728x90_31.jpg" alt="MIL規格（米軍規格）準拠の強靭激レア【ストラップ・リング】を店頭のみ現金特価で発売開始!!" width="728" height="90" border="0" /></a>',
'<a href="fair/32.html"><img src="share/fair_images/Sbanner728x90_32.jpg" alt="サムライ・ベース 其の一" width="728" height="90" border="0" /></a>',
'<a href="fair/34.html"><img src="share/fair_images/Sbanner728x90_34.jpg" alt="山と森から学ぶこと 〜植樹体験雑記・自分自身に出来るエコとは〜" width="728" height="90" border="0" /></a>',
'<a href="fair/36.html"><img src="share/fair_images/Sbanner728x90_36.jpg" alt="特殊な管楽器をお売りください!" width="728" height="90" border="0" /></a>',
'<a href="fair/37.html"><img src="share/fair_images/Sbanner728x90_37.jpg" alt="中古楽器が店頭に並ぶまで" width="728" height="90" border="0" /></a>',
'<a href="fair/37_b.html"><img src="share/fair_images/Sbanner728x90_37b.jpg" alt="中古楽器が店頭に並ぶまで" width="728" height="90" border="0" /></a>',
'<a href="fair/43BWR.html"><img src="share/fair_images/Sbanner728x90_43.jpg" alt="工房直撃！！B,W&amp;R モンスターレプリカ！" width="728" height="90" border="0" /></a>',
'<a href="fair/45pickguard.html"><img src="share/fair_images/Sbanner728x90_45.jpg" alt="超クールなアクセガード！" width="728" height="90" border="0" /></a>',
'<a href="fair/50TreeOfLife.html"><img src="share/fair_images/Sbanner728x90_50.jpg" alt="マーチンギター最高峰・究極の&quot;Tree of Life&quot;" width="728" height="90" border="0" /></a>',
'<a href="fair/51Gibson100th.html"><img src="share/fair_images/Sbanner728x90_51.jpg" alt="Gibson 100th Anniversary Custom SJ-200" width="728" height="90" border="0" /></a>'
);


var numDisp = Math.floor(Math.random() * b.length);
document.getElementById('randBannar').innerHTML = b[numDisp];

}