function DWL(text)
{
	document.write(text + "<BR>");
}

function IsOddNumber(num)
{
	return (1 == (num % 2));
}

/*-----------------------------------------------------------*/
// URL操作
// テストコード：urltest.html
/*-----------------------------------------------------------*/
function SetURLText(text, key, val)
{
	if("" == text){
		text += ("&" + key + "=" +val);
	} else if(null == text.match("&" + key + "=")){
		text += (";&" + key + "=" +val);
	} else {
		var regex = new RegExp("&"+key+"=[^;]*", "i");
		text = text.replace(regex, "&"+key+"="+val);
	}

	return text;
}

function GetURLText(text, key)
{
	var regex = new RegExp("&"+key+"=([^;]*)", "i");
	var result = text.match(regex);
	if(null == result){
		return undefined;
	}
	return RegExp.$1;
}

function SetHash(key, val)	/// アンカーに文字列を追加
{
	location.hash = SetURLText(location.hash, key, val);
}

function GetHash(key)	/// アンカーから文字列取得
{
	return GetURLText(location.hash, key);
}

function ClearHash(key)	/// アンカーの値を消去
{
	return location.hash = "";
}

function SetSearch(key, val)
{
	location.search = SetURLText(location.search, key, val);
}

function GetSearch(key)
{
	return GetURLText(location.search, key);
}

function ClearSearch()
{
	return location.search = "";
}

// Cookie操作
function GetCookie(key)	/// クッキーの値を取得
{
	var tmp = document.cookie + ";";
	var index1 = tmp.indexOf(key, 0);
	if(index1 != -1){
		tmp = tmp.substring(index1,tmp.length);
		var index2 = tmp.indexOf("=",0) + 1;
		var index3 = tmp.indexOf(";",index2);
		return(unescape(tmp.substring(index2,index3)));
	}
	return("");
}

function SetCookie(key, val)	/// クッキーの値をセット
{
	document.cookie = key + "=" + escape(val) + ";expires=Fri, 31-Dec-2030 23:59:59;";
}

// base64文字列を16進数文字列に変換。
function Base64ToHex(base64)
{
	var binary = base64decode(base64);
	var hex="";
	for(i=0; i<binary.length; i++){
		var ascii = binary.charCodeAt(i);
		var temp = ascii.toString(16);
		if(1 == temp.length){
			temp = "0" + temp;
		}
		hex += temp;
	}

	return hex;
}

// 16進数文字列をbase64文字列に変換。
function HexToBase64(hex)
{
	if (IsOddNumber(hex.length)){
		hex = "0" + hex;
	}

	var binary = "";

	for(var i=0; i<hex.length; i += 2){
		var ascii = Number("0x" + hex.charAt(i) + hex.charAt(i+1));
		binary += String.fromCharCode(ascii);
	}

	return base64encode(binary);
}

// 真偽テーブルを2進数とみなし、16進数文字列に変換
function TableToHex(table)
{
	var hex = "";
	for(var i=0; i<table.length; i += 4){
		var let = table.slice(i, i+3);
		var ascii = 0;
		if(let[0]){ascii += 8;}
		if(let[1]){ascii += 4;}
		if(let[2]){ascii += 2;}
		if(let[3]){ascii += 1;}
		hex += ascii.toString(16);
	}

	return hex;
}

// 16進数文字列を真偽テーブルに変換
function HexToTable(hex)
{
	var table = new Array();

	for(var i=0; i<hex.length; i++){
		var num = Number("0x"+hex.charAt(i));
		table.push((0 != (num & 0x8))? true: false);
		table.push((0 != (num & 0x4))? true: false);
		table.push((0 != (num & 0x2))? true: false);
		table.push((0 != (num & 0x1))? true: false);
	}

	return table;
}

function TableToBase64(table)	/// 真偽配列をBase64文字列に変換
{
	return HexToBase64(TableToHex(table));
}

function Base64ToTable(base64)	/// 真偽配列をBase64文字列に変換
{
	return HexToTable(Base64ToHex(base64));
}

function compTable(table1, table2)
{

	if(table1.length != table2.length){
		return false;
	}

	for(var i=0;i<table1.length;i++){
		if(table1[i] != table2[i]){
			return false;
		}
	}

	return true;
}

// JSON操作
function JsonToText(objJSON)	/// JSONデータを文字列に変換
{
	if("object" != typeof objJSON){
		return "";
	}
	if(null == objJSON){
		return "";
	}

	var text = "{";
	for(var i in objJSON){
//		text += ('"' + i + '":');
		text += (i+":");
		if("number" == typeof objJSON[i]){
			text += objJSON[i];
		}else if("string" == typeof objJSON[i]){
			text += ('"' + objJSON[i] + '"');
		}
		text += ',';
	}
	text = text.slice(0, -1);	// 末尾の１文字(',')を削除。
	text += "}";

	return text;
}

function TextToJson(objText)	/// 文字列をJSONデータに変換
{
	return eval("(" + objText + ")");
}

function CalcCheckSum(text){
	var sum = 0;
	
	for(var i=0; i<text.length; i++){
		sum += text.charCodeAt(i);
	}

	return sum % 100;
}

function Wnov_getSession()
{
	var zip = GetHash("d");
	var sum = GetHash("s");
	if(undefined == zip || undefined == sum){
		return {file:"title.txt", page:0, flag:undefined};
	}

	// CheckSumによるチェック
	if(sum != CalcCheckSum(zip)){
		alert("保存データが壊れている可能性があります。");
		return {file:"title.txt", page:0, flag:undefined};
	}

	var text = zip_inflate(base64decode(zip));

	var json = stringParseJSON(text);
	return json;
}