/**
 * ====================================================
 * JavaScript (top)
 *
 * @author    : maomao
 * @date      : 2006/09/01
 * @copyright : (c) maomao-studio. All Rights Reserved.
 *     
 * ====================================================
 */

/*---------- CSS振り分け ----------*/
function envSet() {
	// ブラウザ判別
	var ua = navigator.userAgent;
	this.NN4  = (document.layers);
	this.IE5 = (ua.indexOf("MSIE 5") != -1);
	this.IE50 = (ua.indexOf("MSIE 5.0") != -1);
	this.IE55 = (ua.indexOf("MSIE 5.5") != -1);
	this.IE6 = (ua.indexOf("MSIE 6") != -1);
	this.IE   = (ua.indexOf("MSIE") != -1);
	this.Moz  = (ua.indexOf("Gecko") != -1);
	this.Saf  = (ua.indexOf("Safari") != -1);
	this.Op  = (ua.indexOf("Opera") != -1);
	this.Op6  = (ua.match(/Opera.6/) != null); // Opera "6" only
	// OS判別
	this.Win98  = (ua.indexOf("Windows 98") != -1);
	this.WinMe  = (ua.indexOf("Windows Me") != -1);
	this.Win  = (ua.indexOf("Windows") != -1);
	this.Mac  = (ua.indexOf("Mac") != -1);
	if (this.Op6) this.IE50 = this.IE = false; // WinIE を騙っていた時の対策
	if (this.Omn) this.NN4            = false; // document.layers に反応してるので
	// CSS ファイルのあるディレクトリ（絶対パス）
	this.cssDir = "./css/";
	
	// 各ブラウザ用補正 CSS のファイル名
	if (this.IE55 && this.Win) this.patchCSS = "base_win_ie55.css";
	if (this.IE6 && this.Win) this.patchCSS = "base_win_ie6.css";
	if (this.Moz && this.Win)  this.patchCSS = "base_moz.css";
	if (this.Op)              this.patchCSS = "base_opera.css";
	if (this.IE5 && this.Mac)  this.patchCSS = "base_mac_ie5.css";
	if (this.Saf)              this.patchCSS = "base_safari.css";
	if (this.Win98) this.patchCSS = "base_win98.css";
	if (this.WinMe) this.patchCSS = "base_winme.css";
	// DOM 処理関係
	this.DOMenabled =  (document.getElementsByTagName) ? true : false;
	this.firstLoad = n2.isFirstLoad;
	return this;
}

function nyan2Func() {}
nyan2Func.prototype = {
	getAfter : function(_str, _word) {
		// 文字列 _str 中から _word 以降の残りを抽出する\
		var offset = _str.indexOf(_word)
		if (offset == -1) return _str;
			else return _str.substring(offset + _word.length, _str.length);
	},
	makeTag : function() {
		// makeTag( tagName, [attr=value, ... ] , content|null )
		var me = this.makeTag;
		var n = me.arguments.length;
		var tag = "<" + me.arguments[0];
		for (var i=1; i<n-1; i++) {
			if (!me.arguments[i]) continue;
			var attrs = me.arguments[i].split("=");
			var attr = attrs[0];
			var value = attrs.slice(1, attrs.length).join("=");
			tag += ' ' + attr + '="' + value + '"';
		}
		if (me.arguments[n-1]) tag += ">" + me.arguments[n-1] + "</" + me.arguments[0] + ">";
			else tag += " />";
		return tag;
	},
	loadCSS : function(_file) {
		if (!_file) return;
		// NN4, Opera6 は document.styleSheets を理解不能
		//var title = (document.styleSheets && document.styleSheets.length > 0) ? document.styleSheets[0].title : null;
		//title = (title) ? "title=" + title : null;
		var title = null;
		var media = (!env.NN4) ? "media=screen,tv" : null;
		var cLINK = this.makeTag(
			"link",
			"rel=styleSheet",
			"type=text/css",
			"href=" + env.cssDir + _file,
			media,
			title,
			null
		);
		document.write(cLINK);
	}
}
var n2 = new nyan2Func();
var env = new envSet();
n2.loadCSS(env.patchCSS);