var base64EncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var base64DecodeChars = new Array(-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1);
function base64encode(str) {
	var out, i, len;
	var c1, c2, c3;
	len = str.length;
	i = 0;
	out = "";
	while(i < len) {
	c1 = str.charCodeAt(i++) & 0xff;
	if(i == len)
	{
	out += base64EncodeChars.charAt(c1 >> 2);
	out += base64EncodeChars.charAt((c1 & 0x3) << 4);
	out += "==";
	break;
	}
	c2 = str.charCodeAt(i++);
	if(i == len)
	{
	out += base64EncodeChars.charAt(c1 >> 2);
	out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
	out += base64EncodeChars.charAt((c2 & 0xF) << 2);
	out += "=";
	break;
	}
	c3 = str.charCodeAt(i++);
	out += base64EncodeChars.charAt(c1 >> 2);
	out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
	out += base64EncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >>6));
	out += base64EncodeChars.charAt(c3 & 0x3F);
	}
	return out;
}
function base64decode(str) {
	var c1, c2, c3, c4;
	var i, len, out;
	len = str.length;
	i = 0;
	out = "";
	while(i < len) {
	/* c1 */
	do {
	c1 = base64DecodeChars[str.charCodeAt(i++) & 0xff];
	} while(i < len && c1 == -1);
	if(c1 == -1)
	break;
	/* c2 */
	do {
	c2 = base64DecodeChars[str.charCodeAt(i++) & 0xff];
	} while(i < len && c2 == -1);
	if(c2 == -1)
	break;
	out += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4));
	/* c3 */
	do {
	c3 = str.charCodeAt(i++) & 0xff;
	if(c3 == 61)
	return out;
	c3 = base64DecodeChars[c3];
	} while(i < len && c3 == -1);
	if(c3 == -1)
	break;
	out += String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2));
	/* c4 */
	do {
	c4 = str.charCodeAt(i++) & 0xff;
	if(c4 == 61)
	return out;
	c4 = base64DecodeChars[c4];
	} while(i < len && c4 == -1);
	if(c4 == -1)
	break;
	out += String.fromCharCode(((c3 & 0x03) << 6) | c4);
	}
	return out;
}