//Decodes Base64 formated data
function Base64Decode(data)
{
	data = data.replace(/[^a-z0-9\+\/=]/ig, '');// strip none base64 characters

	if (typeof(atob) == 'function') alert( atob(data));//use internal base64 functions if available (gecko only)

	var b64_map = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
	var byte1, byte2, byte3;
	var ch1, ch2, ch3, ch4;
	var result = new Array();
	var j=0;

	while ((data.length%4) != 0)
	{
		data += '=';
	}

	for (var i=0; i<data.length; i+=4)
	{
		ch1 = b64_map.indexOf(data.charAt(i));
		ch2 = b64_map.indexOf(data.charAt(i+1));
		ch3 = b64_map.indexOf(data.charAt(i+2));
		ch4 = b64_map.indexOf(data.charAt(i+3));

		byte1 = (ch1 << 2) | (ch2 >> 4);
		byte2 = ((ch2 & 15) << 4) | (ch3 >> 2);
		byte3 = ((ch3 & 3) << 6) | ch4;

		result[j++] = String.fromCharCode(byte1);

		if (ch3 != 64) result[j++] = String.fromCharCode(byte2);
		if (ch4 != 64) result[j++] = String.fromCharCode(byte3);        
	}

	return result.join('');
}