function LimparConteudoControle(p_objCtrl) {
    while (p_objCtrl.hasChildNodes()) {
        p_objCtrl.removeChild(p_objCtrl.lastChild);
    }
}

function RetornarQueryString(p_strChave) {
    var arrChavesValores = window.location.search.substr(1).split("&");
    for (var i = 0; i < arrChavesValores.length; i++) {
        if (arrChavesValores[i].substr(0, p_strChave.length) == p_strChave) {
            return arrChavesValores[i].substr(arrChavesValores[i].indexOf("=") + 1);
        }
    }
    return null;
}

var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

function decode64(input) {
   var output = "";
   var chr1, chr2, chr3;
   var enc1, enc2, enc3, enc4;
   var i = 0;

   // remove all characters that are not A-Z, a-z, 0-9, +, /, or =
   input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

   do {
      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);
      }
   } while (i < input.length);

   return output;
}