function banner_changer() {
	max_banner=8;
	banner = new Array();
	message = new Array();
	link = new Array();	

	
	banner[0]="hanyurisangyou.jpg";
	message[0]="株式会社半布里産業";
	link[0] = "http://www.haburi-sangyo.co.jp/";
	
	
	banner[1]="mitinoeki.jpg";
	message[1]="半布里の郷 とみか";
	link[1] = "http://hanyuri.com/";
	
	
	//banner[1]="vr.gif";
	//message[1]="株式会社vr";
	//link[1] = "http://www.vrtc.co.jp/";




	dummy_banner=new Array();
	for(i=0;i<max_banner-banner.length;i++){
		j= i + 1;
		dummy_banner[i]="koukoku-" + j + ".gif";
	}
	
	
	order=new Array();
	
	for(i=0;i<banner.length;i++){
		order[i]=i;
	}
	count = Math.floor(Math.random()*100);
		
	for(i=0;i<count;i++){
		src = Math.floor(Math.random()*banner.length);
		dst = Math.floor(Math.random()*banner.length);
		if (src!=dst)
		{
			tmp=order[src];
			order[src]=order[dst];
			order[dst]=tmp;
		}
	}
	
	dummy_order=new Array();
	for(i=0;i<dummy_banner.length;i++){
		dummy_order[i]=i;
	}
	for(i=0;i<count;i++){
		src = Math.floor(Math.random()*dummy_banner.length);
		dst = Math.floor(Math.random()*dummy_banner.length);
		if (src!=dst)
		{
			tmp=dummy_order[src];
			dummy_order[src]=dummy_order[dst];
			dummy_order[dst]=tmp;
		}
	}

	for(i=0;i<max_banner;i++){
		document.write("<tr>");
		document.write("<td>");
		if (i<banner.length){
			rand = order[i];
			if (link[rand]!='#'){
				document.write("<a target='_blank' href="+link[rand]+">");
			}
			document.write("<img width=130 height=50 alt="+message[rand]+" src=koukoku/"+banner[rand]+" style='border-style:none'>");
			if (link[rand]!='#'){
				document.write("</a>");
			}
		} else if (i>=banner.length && i<banner.length+dummy_banner.length ) {
			rand = dummy_order[i-banner.length];
			document.write("<img width=130 height=50 alt='空欄' src=koukoku/"+dummy_banner[rand]+" style='border-style:none'>");
		} else {
			document.write("<img width=130 height=50 alt='広告' src=koukoku/koukoku.gif style='border-style:none'>");
		}
		
		document.write("</td>");
		document.write("</tr>");
	}
	document.write("<tr>");
	document.write("<td>");
	document.write("<a href='koukoku/koukoku.html'>");
	document.write("<img width=130 height=50 alt='バナー広告募集について' src=koukoku/koukokubosyu.gif style='border-style:none'>");
	document.write("</a>");
	document.write("</td>");
	document.write("</tr>");
}