/* (c)Yukihiro - http://www.geocities.jp/studio_risu_jp/ */
function back_img()
{
	path = "http://blog117.fc2.com/n/nabehide/file/";
	//path = "file/";
	i = 0;
	ranImg = new Array();
	ranImg[i++] = "head_1.jpg";
	ranImg[i++] = "head_2.jpg";
	ranImg[i++] = "head_3.jpg";
	ranImg[i++] = "head_4.jpg";
	ranImg[i++] = "head_5.jpg";
	ranImg[i++] = "head_6.jpg";
	ImgNo = Math.floor(ranImg.length*Math.random());
	ranImg = ranImg[Math.floor(ImgNo)];
	document.write('<div class="head_all" style="background-image\:url(' + path + ranImg + ')\;>');
}