title: Need decryption script
body: <p>I have this encryption code in javascript and its decryption was written in other language which I dont know. But I want to have a decryption of that in javascript ! Can any one help me on this.</p>
  
  <pre><code>function getEncryptedPassword(str) {
  var keyStr = 'ABCDEFGHIJKLMNOP' +
      'QRSTUVWXYZabcdef' +
      'ghijklmnopqrstuv' +
      'wxyz0123456789+/' +
      '=';
  var unEncPw = escape(str), output = '', i = 0;
  var chr1, chr2, chr3 = '';
  var enc1, enc2, enc3, enc4 = '';
  
  do {
      chr1 = unEncPw.charCodeAt(i++);
      chr2 = unEncPw.charCodeAt(i++);
      chr3 = unEncPw.charCodeAt(i++);
  
      enc1 = chr1 &gt;&gt; 2;
      enc2 = ((chr1 &amp; 3) &lt;&lt; 4) | (chr2 &gt;&gt; 4);
      enc3 = ((chr2 &amp; 15) &lt;&lt; 2) | (chr3 &gt;&gt; 6);
      enc4 = chr3 &amp; 63;
  
      if (isNaN(chr2)) {
          enc3 = enc4 = 64;
      } else if (isNaN(chr3)) {
          enc4 = 64;
      }
  
      output = output +
          keyStr.charAt(enc1) +
          keyStr.charAt(enc2) +
          keyStr.charAt(enc3) +
          keyStr.charAt(enc4);
      chr1 = chr2 = chr3 = '';
      enc1 = enc2 = enc3 = enc4 = '';
  } while (i &lt; unEncPw.length);
  
  return output;
  }
  </code></pre>
  
  <p>Thanks in advance.!</p>