function encodeBase64(inStr){
	var code1, code2, code3;
	var outStr = "";
	var i = 0;
	var len = inStr.length;
	var Base64chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

	while (i < len){
		code1 = inStr.charCodeAt(i++);
		outStr += Base64chars.charAt(code1 >> 2);
		if(i == len){
			outStr += Base64chars.charAt((code1 & 0x3) << 4);
			outStr += "==";
			break;
		}
		code2 = inStr.charCodeAt(i++);
		outStr += Base64chars.charAt(((code1 & 0x3) << 4) | (code2 >> 4));
		if(i == len){
			outStr += Base64chars.charAt((code2 & 0xf) << 2);
			outStr += "=";
			break;
		}
		code3 = inStr.charCodeAt(i++);
		outStr += Base64chars.charAt(((code2 & 0xf) << 2) | (code3 >> 6));
		outStr += Base64chars.charAt(code3 & 0x3f);
	}
	return outStr;
}

function decodeBase64(inStr){
	var num1, num2, num3, num4;
	var outStr = "";
	var i = 0;
	var len = inStr.length;
	var Base64charNum = 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);


	while (i < len){
		num1 = Base64charNum[inStr.charCodeAt(i++)];
		num2 = Base64charNum[inStr.charCodeAt(i++)];
		outStr += String.fromCharCode((num1 << 2) | (num2 >> 4));
		if (inStr.charAt(i) == "="){
			break;
		}
		num3 = Base64charNum[inStr.charCodeAt(i++)];
		outStr += String.fromCharCode(((num2 & 0xf) << 4) | (num3 >> 2));
		if (inStr.charAt(i) == "="){
			break;
		}
		num4 = Base64charNum[inStr.charCodeAt(i++)];
		outStr += String.fromCharCode(((num3 & 0x3) << 6) | num4);
	}
	return outStr;
}