/*フォントサイズ変更*/
function changeFsize(size) {
	var change = document.getElementsByTagName("body")[0];
	switch(size) {
		case "s": var percent = "65.5%"; break;
		case "m": var percent = "80%"; break;
		case "l": var percent = "110%"; break;
	}
	change.style.fontSize = percent;
}

/* 背景色を変更 */
/* 背景画像のurlはhtml基準なので注意 */
function changeBgcolor(color) {
	var change = document.getElementById('contents');
	var tcolor = document.getElementsByTagName("body")[0];
	switch(color) {
		case "w": var bgcol = "#ffffff";
				  var txcol = "#000080";
								  break;
		case "s": var bgcol = "url(./sub/image/bg_steel.gif)";
				  var txcol = "#434343";
								  break;
		case "b": var bgcol = "#000000";
				  var txcol = "#ffffff";
								  break;
	}
	change.style.background = bgcol;
	tcolor.style.color = txcol;
}
/* お気に入りに登録する */
function bookMark() {
	var url = 'http://www.nakanihon.ac.jp/';
	var name = 'Nakanihon Automotive College';
	window.external.addFavorite(url,name);
}