$(document).ready(function(){

});

function base64_decode(data){
  var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
  var o1, o2, o3, h1, h2, h3, h4, bits, i = 0, ac = 0, dec = "", tmp_arr = [];

  if(!data){
	return data;
  }

  data += '';

  do{
	h1 = b64.indexOf(data.charAt(i++));
	h2 = b64.indexOf(data.charAt(i++));
	h3 = b64.indexOf(data.charAt(i++));
	h4 = b64.indexOf(data.charAt(i++));

	bits = h1<<18 | h2<<12 | h3<<6 | h4;

	o1 = bits>>16 & 0xff;
	o2 = bits>>8 & 0xff;
	o3 = bits & 0xff;

	if (h3 == 64) {
		tmp_arr[ac++] = String.fromCharCode(o1);
	} else if (h4 == 64) {
		tmp_arr[ac++] = String.fromCharCode(o1, o2);
	} else {
		tmp_arr[ac++] = String.fromCharCode(o1, o2, o3);
	}
  }while(i < data.length);

  dec = tmp_arr.join('');

  return dec;
}