var aryAd = [];

var img = '';
img += 'width: 780px;';
img += 'height: 120px;';
img += 'border: 0px none;';



var aryTmp = {
	'per': '100',
	'url': 'http://black-diamond.asia/lp-sp/blog001/archive10-etoy/index.php?sid=r23540&kt=r',
	'txt': '【驚愕】一週間でチンポが１０ｃｍ伸びるサプリを試したワイの末路・・・ｗｗｗｗｗｗｗｗｗｗｗ（画像あり）',
	'img': 'http://blog-sokuhou.com/pc-img/banner/slt_780x120.jpg'
};
aryAd.push(aryTmp);

var num = Math.floor(Math.random () * 100) + 1;
for ( var i = 0, cnt = 0; i < aryAd.length; i++ ) {
	cnt += Number(aryAd[i].per);
	if ( num <= cnt ) { break; }
}

var src = '';
src += '<div>';
src += '<a href="' + aryAd[i].url + '&title=' + encodeURI(aryAd[i].txt) + '" title="' + aryAd[i].txt + '" target="_blank">';
src += '<img src="' + aryAd[i].img + '" alt="' + aryAd[i].txt + '" style="' + img + '">';
src += '</a></div>';
document.write(src);