function showLAYER(idName) {
	if (document.getElementById) {
		if (document.getElementById(idName).style.visibility == 'hidden') {
			document.getElementById(idName).style.visibility = "visible" ;
		}
		else {
			document.getElementById(idName).style.visibility = "hidden" ;
		}
	}
	else if (document.all) {
		if (document.all(idName).style.visibility == 'hidden') {
			document.all(idName).style.visibility = "visible" ;
		}
		else {
			document.all(idName).style.visibility = "hidden" ;
		}
	}
}

function hideLAYER(idName) {
	if (document.getElementById) {
		document.getElementById(idName).style.visibility = "hidden" ;
	}
	else if (document.all) {
		document.all(idName).style.visibility = "hidden" ;
	}
}

function foldLAYER(idName) {
	if (document.getElementById) {
		if (document.getElementById(idName).style.display == "none") {
			document.getElementById(idName).style.display = "block" ;
		}
		else {
			document.getElementById(idName).style.display = "none" ;
		}
	}
}

function prTxtAd() {
	m = 0, x = 0, y = 0;
	ad  = new Array();
	adv = new Array();
	hit = new Array();

	// hitには相対確率を入れる
	hit[0] = 1; adv[0] = '<p><a href="http://www.comedywaltz.com/search/cotoha/" target="_blank" onclick="pageTracker._trackEvent(\'Clicks\', \'pr\', \'cotoha\');">Yahoo!関連検索ワードを調べるなら、サクサク動く「cotoha」</a></p>';
	hit[1] = 1; adv[1] = '<p><a href="http://www.comedywaltz.com/search/recipe/" target="_blank" onclick="pageTracker._trackEvent(\'Clicks\', \'pr\', \'recipe\');">食材やメニュー名でWeb上のレシピを簡単検索！「レシピ検索」</a></p>';
	hit[2] = 1; adv[2] = '<p><a href="http://sunday.comedywaltz.com/" target="_blank" onclick="pageTracker._trackEvent(\'Clicks\', \'pr\', \'sundaysoundtrack\');">動物園や東京のおいしい店の話題など。個人ブログsundaysoundtrack</a></p>';
	hit[3] = 1; adv[3] = '<p><a href="http://blog.livedoor.jp/sundaysoundtrack-karugamo/" target="_blank" onclick="pageTracker._trackEvent(\'Clicks\', \'pr\', \'karugamo\');">街で見つけた広告のメモBlog。モバイルで更新中「喫茶カルガモ」</a></p>';
	hit[4] = 1; adv[4] = '<p><a href="http://130museum.com/" target="_blank" onclick="pageTracker._trackEvent(\'Clicks\', \'pr\', \'130museum\');">彫塑や色紙絵、戦時中の絵ハガキなどを公開中「清水勲ミュージアム」</a></p>';
	hit[5] = 1; adv[5] = '<p><a href="http://makitani.jugem.cc/" target="_blank" onclick="pageTracker._trackEvent(\'Clicks\', \'pr\', \'Meal301\');">作った料理を淡々と記録しているブログ。相方さんが絶賛更新中</a></p>';

	for(i=0; i<=hit.length - 1; i++) {
		m += hit[i];
	}
	n = Math.floor(Math.random() * m);
	n++;
	for(i=0; i<=hit.length - 1; i++) {
		x = y;
		y += hit[i];
		if(x<n && n<=y) ad = adv[i];
	}
	document.write(ad);
}