var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

function base64_encode(input) {
   var output = "";
   var chr1, chr2, chr3;
   var enc1, enc2, enc3, enc4;
   var i = 0;
   while(i < input.length){
      chr1 = input.charCodeAt(i++);
      chr2 = input.charCodeAt(i++);
      chr3 = input.charCodeAt(i++);
      enc1 = chr1 >> 2;
      enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
      enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
      enc4 = chr3 & 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);
   }
   return output;
}

function base64_decode(input) {
   var output = "";
   var chr1, chr2, chr3;
   var enc1, enc2, enc3, enc4;
   var i = 0;
   input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
   while(i < input.length){
      enc1 = keyStr.indexOf(input.charAt(i++));
      enc2 = keyStr.indexOf(input.charAt(i++));
      enc3 = keyStr.indexOf(input.charAt(i++));
      enc4 = keyStr.indexOf(input.charAt(i++));
      chr1 = (enc1 << 2) | (enc2 >> 4);
      chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
      chr3 = ((enc3 & 3) << 6) | enc4;
      output = output + String.fromCharCode(chr1);
      if (enc3 != 64) output = output + String.fromCharCode(chr2);
      if (enc4 != 64) output = output + String.fromCharCode(chr3);
   }
   return output;
}

function insertMailto(add, val, subj, sclass){
    document.write('<a href="mailto:' + base64_decode(add) + '?subject=' + subj + '" class="' + sclass + '">' + base64_decode(val) + '</a>');
}

function insertAddress(str){
    document.write(base64_decode(str));
}