Allowing dangerous query strings

System.Text.ASCIIEncoding.ASCII.GetBytes

System.Convert.ToBase64String

System.Convert.FromBase64String

System.Text.ASCIIEncoding.ASCII.GetString

$(document).ready( function() {
    $('form').bind('submit', function() {
        $('form' > 'input[type=text]').each( function(i) {
           if (this.value) {
              this.value = encode(this.value);
           }
        });
    });
 });

 function encode(value) {
    return ...suitable encoding...
 }

<script type="text/javascript">

 var unencodedText = "This is my text that contains whitespaces and characters like  and Ø";
 var encodedText = "";
 var decodedText = "";
 alert('unencodedText: ' + unencodedText);

 //To encode whitespaces and the 'Ø' character - use encodeURI
 encodedText = encodeURI(unencodedText);
 //We see that whitespaces and 'Ø' are encoded, but the '' is still there:
 alert('encodedText: ' + encodedText);

 //If we decode it we should get our unencodedText back
 decodedText = decodeURI(encodedText);
 alert('decodedText: ' + decodedText);

 //To also encode the '' we use the encodeURIComponent
 encodedText = encodeURIComponent(unencodedText);
 //Now all the characters have been encoded:
 alert('encodedText: ' + encodedText);

 //To get our unencodedText back we now need to use the decodeURIComponent
 decodedText = decodeURIComponent(encodedText);
 alert('decodedText: ' + decodedText);

</script>