function get_encoded() {
    var plaintext = document.getElementById('plaintext');
    var plaintext_value = plaintext.value.replace(/%/, "%25");
    var plaintext_value = plaintext.value.replace(/&/, "%26");
    ajax_post('get_encoded.php','plaintext='+plaintext_value, 'encoded_success(request)', 'encoded_error(request)');
}

function encoded_success(request) {
    eval(request.responseText);
    var encodedtext = document.getElementById('encodedtext');
    encodedtext.value = encoded_text;
}

function encoded_error(request) {
    eval(request.responseText);
}


function get_decoded() {
    var encodedtext = document.getElementById('encodedtext');
    var encodedtext_value = encodedtext.value;
    ajax_post('get_decoded.php','encodedtext='+encodedtext_value, 'decoded_success(request)', 'decoded_error(request)');
}

function decoded_success(request) {
    eval(request.responseText);
    var plaintext = document.getElementById('plaintext');
    plaintext.value = unescape(plain_text);
}

function decoded_error(request) {
    eval(request.responseText);
}