ÿþvar azWin = '     
               Q        !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNO';

var azKoi = 'Q                
           N01F45D3E89:;<=>?O@ABC62LK7HMIGJ.&$%/ !"#,+(-)'*';

var AZ=azWin;

var azURL = '0123456789ABCDEF';

var b64s  = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';

var b64a  = b64s.split('');



function enBASE64(str) 

{

  var a=Array(), i;

  for( i=0; i<str.length; i++ ) {

    var cch=str.charCodeAt(i);

    if( cch>127 ){  cch=AZ.indexOf(str.charAt(i))+163; if(cch<163) continue; }

    a.push(cch);

  }

  var s=Array(), lPos = a.length - a.length % 3;

  for(i=0;i<lPos;i+=3) {

    var t=(a[i]<<16)+(a[i+1]<<8)+a[i+2];

    s.push( b64a[(t>>18)&0x3f]+b64a[(t>>12)&0x3f]+b64a[(t>>6)&0x3f]+b64a[t&0x3f] );

  }

  switch ( a.length-lPos ) {

    case 1 : var t=a[lPos]<<4; s.push(b64a[(t>>6)&0x3f]+b64a[t&0x3f]+'=='); break;

    case 2 : var t=(a[lPos]<<10)+(a[lPos+1]<<2); s.push(b64a[(t>>12)&0x3f]+b64a[(t>>6)&0x3f]+b64a[t&0x3f]+'='); break;

  }

  return s.join('');

}

function deBASE64(str) 

{

  while(str.substr(-1,1)=='=') str=str.substr(0,str.length-1);

  var b=str.split(''), i;

  var s=Array(), t;

  var lPos = b.length - b.length % 4;

  for(i=0;i<lPos;i+=4) {

    t=(b64s.indexOf(b[i])<<18)+(b64s.indexOf(b[i+1])<<12)+(b64s.indexOf(b[i+2])<<6)+b64s.indexOf(b[i+3]);

    s.push( ((t>>16)&0xff), ((t>>8)&0xff), (t&0xff) );

  }

  if( (b.length-lPos) == 2 ){ t=(b64s.indexOf(b[lPos])<<18)+(b64s.indexOf(b[lPos+1])<<12); s.push( ((t>>16)&0xff)); }

  if( (b.length-lPos) == 3 ){ t=(b64s.indexOf(b[lPos])<<18)+(b64s.indexOf(b[lPos+1])<<12)+(b64s.indexOf(b[lPos+2])<<6); s.push( ((t>>16)&0xff), ((t>>8)&0xff) ); }

  

  //strange IE bug

  if (is_ie) {

	s[s.length-3]++;

	s[s.length-2] = 0;

  }

  for( i=s.length-1; i>=0; i-- ){

    if( s[i]>=168 ) s[i]=AZ.charAt(s[i]-163);

    else s[i]=String.fromCharCode(s[i]);

  };

  

 return s.join('');

}