function leftbanner(){
	var contentsList =new Array();
	contentsList[0] = "<a href='http://www.t-com.ne.jp/service/isp_change/index.html'><img src='parts_top_jmages/left_c_banner.jpg' width='168' height='80' alt='他社からのお乗り換え' /></a>";
	r = Math.floor(Math.random()*contentsList.length);
	for (i=0; i < 1 ;i++) {
		k = r+i;
		if (k >= contentsList.length)
			k = 0+i;
			data = contentsList[k].split(",");
			document.write ("",data[0],"");

	}
}