function setMainBanner(){
	var bnrtitle = new Array();
	var bnrimage = new Array();
	var bnrurl = new Array();
	var bnrtarget = new Array();
	var num = 0;
	
	bnrtitle[num] = 'MILKFED BLOG 03';
	bnrimage[num] = '<span class="mt-enclosure mt-enclosure-image" style="display: inline;"><a href="http://blog.milkfed.jp/_banner/images/2010/02/9/milkfedblog_03.jpg">表示</a></span>';
	bnrurl[num] = 'http://blog.milkfed.jp';
	
	bnrtarget[num] = '0';
	num++;
	
	bnrtitle[num] = 'MILKFED BLOG 02';
	bnrimage[num] = '<span class="mt-enclosure mt-enclosure-image" style="display: inline;"><a href="http://blog.milkfed.jp/_banner/images/2010/02/9/milkfedblog_02.jpg">表示</a></span>';
	bnrurl[num] = 'http://blog.milkfed.jp';
	
	bnrtarget[num] = '0';
	num++;
	
	bnrtitle[num] = 'MILKFED BLOG 01';
	bnrimage[num] = '<span class="mt-enclosure mt-enclosure-image" style="display: inline;"><a href="http://blog.milkfed.jp/_banner/images/2010/02/9/milkfedblog_01.jpg">表示</a></span>';
	bnrurl[num] = 'http://blog.milkfed.jp';
	
	bnrtarget[num] = '0';
	num++;
	
	bnrtitle[num] = '15th ANNIVERSARY';
	bnrimage[num] = '<span class="mt-enclosure mt-enclosure-image" style="display: inline;"><a href="http://blog.milkfed.jp/_banner/images/2010/01/29/pencil.jpg">表示</a></span>';
	bnrurl[num] = 'http://';
	
	bnrtarget[num] = '0';
	num++;
	
	bnrtitle[num] = 'Milk';
	bnrimage[num] = '<span class="mt-enclosure mt-enclosure-image" style="display: inline;"><a href="http://blog.milkfed.jp/_banner/images/2010/01/29/milk03.jpg">表示</a></span>';
	bnrurl[num] = "http://";
	
	bnrtarget[num] = '0';
	num++;
	
	if(!bnrimage){ return; }
	for(i=0; i<bnrimage.length; i++){
		bnrimage[i] = bnrimage[i].split('<span class="mt-enclosure mt-enclosure-image" style="display: inline;"><a href="').join("");
		bnrimage[i] = bnrimage[i].split('">表示</a></span>').join("");
	}
	
	var randnum = Math.floor( Math.random() * bnrimage.length );
	
	var urlflg = bnrurl[randnum] != "http://" && bnrurl[randnum] != "" ? true : false;
	var image = "";
	if(urlflg) image += '<a href="' + bnrurl[randnum] + '"';
	if(urlflg && bnrtarget[randnum] == "1") image += ' target="_blank"';
	if(urlflg) image += '>';
	image += '<img src="' + bnrimage[randnum] + '" alt="' + bnrtitle[randnum] + '">';
	if(urlflg) image += '</a>';
	
	document.write(image);
}