/**  base64 encode / decode  ==  http://www.webtoolkit.info/  **/
// use like that : base64.encode('剛生完寶/'); or base64.decode('5Ymb55Sf5a6M5a@2Lw__');
var base64 = {
// 	_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=", // standard base64 encoding
	_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789@^~", // my personal base64 encoding method
	encode : function (input)
	{
		var output = "";
		var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
		var i = 0;
// 		alert ('encode = '+input);
		input = base64._utf8_encode(input);
		while (i < input.length)
		{
			chr1 = input.charCodeAt(i++);
			chr2 = input.charCodeAt(i++);
			chr3 = input.charCodeAt(i++);
			enc1 = chr1 >> 2;
			enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
			enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
			enc4 = chr3 & 63;
			if (isNaN(chr2))
			{
				enc3 = enc4 = 64;
			}
			else if (isNaN(chr3))
			{
				enc4 = 64;
			}
			output = output +
			this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
			this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
		}
		return output;
	},
	decode : function (input)
	{
		var output = "";
		var chr1, chr2, chr3;
		var enc1, enc2, enc3, enc4;
		var i = 0;
		input = input.replace(/[^A-Za-z0-9\@\^\~]/g, "");
		while (i < input.length)
		{
			enc1 = this._keyStr.indexOf(input.charAt(i++));
			enc2 = this._keyStr.indexOf(input.charAt(i++));
			enc3 = this._keyStr.indexOf(input.charAt(i++));
			enc4 = this._keyStr.indexOf(input.charAt(i++));
			chr1 = (enc1 << 2) | (enc2 >> 4);
			chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
			chr3 = ((enc3 & 3) << 6) | enc4;
			output = output + String.fromCharCode(chr1);
			if (enc3 != 64)
			{
				output = output + String.fromCharCode(chr2);
			}
			if (enc4 != 64)
			{
				output = output + String.fromCharCode(chr3);
			}
		}
		output = base64._utf8_decode(output);
		return output;
	},
	_utf8_encode : function (string) {
		string = string.replace(/\r\n/g,"\n");
		var utftext = "";
		for (var n = 0; n < string.length; n++)
		{
			var c = string.charCodeAt(n);
			if (c < 128)
			{
				utftext += String.fromCharCode(c);
			}
			else if((c > 127) && (c < 2048))
			{
				utftext += String.fromCharCode((c >> 6) | 192);
				utftext += String.fromCharCode((c & 63) | 128);
			}
			else
			{
				utftext += String.fromCharCode((c >> 12) | 224);
				utftext += String.fromCharCode(((c >> 6) & 63) | 128);
				utftext += String.fromCharCode((c & 63) | 128);
			}
		}
		return utftext;
	},
	_utf8_decode : function (utftext)
	{
		var string = "";
		var i = 0;
		var c = c1 = c2 = 0;
		while ( i < utftext.length )
		{
			c = utftext.charCodeAt(i);
			if (c < 128)
			{
				string += String.fromCharCode(c);
				i++;
			}
			else if((c > 191) && (c < 224))
			{
				c2 = utftext.charCodeAt(i+1);
				string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
				i += 2;
			}
			else
			{
				c2 = utftext.charCodeAt(i+1);
				c3 = utftext.charCodeAt(i+2);
				string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
				i += 3;
			}
		}
		return string;
	}
};

function sl_dec(str,var1)
{
	//var rnum = var1 + var2 - var3;
	var rnum = var1;
	var url2 = ""; 
	str = str.split("/"); 
	for(i=0; i < url.length; i++){ url2 = url2 + String.fromCharCode(str[i] - rnum)};
	return url2;
}