var url_full = location.href.split( "?" )[ 0 ];
var url_filename = url_full.split( "/" )[ url_full.split( "/" ).length - 1 ];
var url_dirname = url_full.substr( 0, url_full.length - url_filename.length );
var lang_json = null;

function convertLang( cookie_lang )
{
	var ret_lang = null;

	if ( lang_json == null )
	{
		$.ajax(
		{
			type: "GET",
			url: url_dirname + "json/lang.json",
			dataType: "json",
			async: false,
			headers:
			{
				"Pragma": "no-cache",
				"Cache-Control": "no-cache",
				"If-Modified-Since": "Thu, 01 Dec 1994 16:00:00 GMT"
			},
			success: function( json )
			{
				lang_json = json;
			},
			error: function( xhr, status, thrown )
			{
				alert( thrown );
			}
		} );
	}

	if ( lang_json != null )
	{
		ret_lang = getLang( cookie_lang );
	}

	if ( ret_lang == undefined || ret_lang == null || ret_lang == "" )
	{
		ret_lang = cookie_lang;
	}

	return ret_lang;
}

function getLang( accept_language )
{
	var ret_lang = null;

	if ( lang_json != null )
	{
		var len = lang_json.length;
		for ( var i = 0; i < len; i++ )
		{
			if ( lang_json[i].accept_language == accept_language )
			{
				ret_lang = lang_json[i].lang;
				break;
			}
		}
	}

	return ret_lang;
}