img = new Array();
img[0] = "http://abemasato.com/img/blog/word_01.gif";
img[1] = "http://abemasato.com/img/blog/word_02.gif";
img[2] = "http://abemasato.com/img/blog/word_03.gif";
img[3] = "http://abemasato.com/img/blog/word_04.gif";
img[4] = "http://abemasato.com/img/blog/word_05.gif";
img[5] = "http://abemasato.com/img/blog/word_06.gif";
img[6] = "http://abemasato.com/img/blog/word_07.gif";
img[7] = "http://abemasato.com/img/blog/word_08.gif";
img[8] = "http://abemasato.com/img/blog/word_09.gif";
img[9] = "http://abemasato.com/img/blog/word_10.gif";
img[10] = "http://abemasato.com/img/blog/word_11.gif";
img[11] = "http://abemasato.com/img/blog/word_12.gif";
img[12] = "http://abemasato.com/img/blog/word_13.gif";
img[13] = "http://abemasato.com/img/blog/word_14.gif";
img[14] = "http://abemasato.com/img/blog/word_15.gif";
img[15] = "http://abemasato.com/img/blog/word_16.gif";
img[16] = "http://abemasato.com/img/blog/word_17.gif";
img[17] = "http://abemasato.com/img/blog/word_18.gif";
img[18] = "http://abemasato.com/img/blog/word_19.gif";
img[19] = "http://abemasato.com/img/blog/word_20.gif";
img[20] = "http://abemasato.com/img/blog/word_21.gif";

function setBanner(){
	amount = img.length;
	No = Math.floor(Math.random()*amount);
	document.write("<img src='" + img[No] + "' border='0'>");
}