diff --git a/api-examples/currencies/index.php b/api-examples/currencies/index.php
index 785949d..7abce89 100644
--- a/api-examples/currencies/index.php
+++ b/api-examples/currencies/index.php
@@ -22,7 +22,7 @@
     <body>
     <div class="container">
         <br/>
-        <a href="/conversion_check.php?code=true">Code sample</a>
+        <a href="./index.php?code=true">Code sample</a>
         <br/>
         <br/>
         <form>
@@ -39,105 +39,97 @@
 
             <div class="form-group">
                 <label for="action">Action</label>
-                <select class="form-control selector" id="action" name="action">
-                    <option value="list" <?= $_GET['action'] == 'list' ? 'selected' : '' ?>>Currencies list</option>
-                    <option value="find" <?= $_GET['action'] == 'find' ? 'selected' : '' ?>>Find a currency by its ID</option>
-                    <option value="get_block" <?= $_GET['action'] == 'get_block' ? 'selected' : '' ?>>Get the latest block number by currency</option>
-                    <option value="get_req" <?= $_GET['action'] == 'get_req' ? 'selected' : '' ?>>Get the required confirmations for each currency</option>
-                    <option value="icon_retrieve" <?= $_GET['action'] == 'icon_retrieve' ? 'selected' : '' ?>>Retrieve the currency icon</option>
-                    <option value="conversions" <?= $_GET['action'] == 'conversions' ? 'selected' : '' ?>>All possible currency conversions</option>
-                    <option value="validate" <?= $_GET['action'] == 'validate' ? 'selected' : '' ?>>Validation</option>
+                <select class="form-control" id="action" name="action">
+                    <option>--</option>
+                    <option>Currencies list</option>
+                    <option>Find a currency by its ID</option>
+                    <option>Get the latest block number by currency</option>
+                    <option>Get the required confirmations for each currency</option>
+                    <option>Retrieve the currency icon</option>
+                    <option>Retrieve the currency icon as svg</option>
+                    <option>All possible currency conversions</option>
+                    <option>Validation</option>
                 </select>
+                </br>
+
+                <div class="form-group" id="name_code_block" style="display: none;">
+                    <label for="name_code">Name/code: </label>
+                    <input type="text" class="form-control" id="name_code" name="name_code">
+                </div>
+
+                <div class="form-group" id="type_block" style="display: none;">
+                    <label for="type">Type:</label>
+                    <select class="form-control" id="type" name="type">
+                        <option>--</option>
+                        <option>Crypto</option>
+                        <option>Token</option>
+                        <option>Fiat</option>
+                    </select>
+                </div>
+
+                <div class="form-group" id="capabilities_block" style="display: none;">
+                    <label for="capability">Capabilities:</label>
+                    <select class="form-control" id="capability" name="capability">
+                        <option>--</option>
+                        <option>multiSigAccounts</option>
+                        <option>sharedAccounts</option>
+                        <option>payments</option>
+                        <option>singleSigAccounts</option>
+                    </select>
+                </div>
+
+                <div class="form-group" id="after_block" style="display: none;">
+                    <label for="after">After:</label>
+                    <input type="text" class="form-control" id="after" name="after">
+                </div>
+
+                <div class="form-group" id="limit_block" style="display: none;">
+                    <label for="limit">Limit:</label>
+                    <input type="text" class="form-control" id="limit" name="limit">
+                </div>
+
+                <div class="form-group" id="currency_id_block" style="display: none;">
+                    <label for="currency_id">Currency ID: <span style="color:#ff0000">*</span></label>
+                    <input type="text" class="form-control" id="currency_id" name="currency_id">
+                </div>
+
+                <div class="form-group" id="address_block" style="display: none;>
+                    <label for="address">Address: <span style="color:#ff0000">*</span></label>
+                <input type="text" class="form-control" id="address" name="address">
             </div>
 
-            <div class="form-group form-temp">
-            </div>
-
-            <button type="submit" class="btn btn-default">Submit</button>
-        </form>
-        <script type="text/javascript">
-            const selectElement = document.getElementsByClassName("selector")[0];
-            var get = document.getElementById("action");
-            var list_elem = document.createElement('div');
-            list_elem.id = "list";
-            list_elem.innerHTML =
-                '<div class="form-group">' +
-                '<label for="q">Name/code: </label> ' +
-                '<input type="text" class="form-control" id="q" name="q" ' +
-                'value="<?= $_GET["q"] ?>"> </div>' +
-
-                '<div class="form-group">' +
-                '<label for="type">Type:</label>' +
-                '<select class="form-control type_selector" id="type" name="type">' +
-                '<option value="none" <?= $_GET["type"] == "none" ? "selected" : "" ?>>--</option>' +
-                '<option value="crypto" <?= $_GET["type"] == "crypto" ? "selected" : "" ?>>Crypto</option>' +
-                '<option value="token" <?= $_GET["type"] == "token" ? "selected" : "" ?>>Token</option>' +
-                '<option value="fiat" <?= $_GET["type"] == "fiat" ? "selected" : "" ?>>Fiat</option>' +
-                '</select></div>' +
-
-                '<div class="form-group">' +
-                '<label for="capability">Capabilities:</label>' +
-                '<select class="form-control capabilities_selector" id="capability" name="capability">' +
-                '<option value="none" <?= $_GET["capability"] == "none" ? "selected" : "" ?>>--</option>' +
-                '<option value="multiSigAccounts" <?= $_GET["capability"] == "multiSigAccounts" ? "selected" : "" ?>>multiSigAccounts</option>' +
-                '<option value="sharedAccounts" <?= $_GET["capability"] == "sharedAccounts" ? "selected" : "" ?>>sharedAccounts</option>' +
-                '<option value="payments" <?= $_GET["capability"] == "payments" ? "selected" : "" ?>>payments</option>' +
-                '<option value="singleSigAccounts" <?= $_GET["capability"] == "singleSigAccounts" ? "selected" : "" ?>>singleSigAccounts</option>' +
-                '</select></div>' +
-
-                '<div class="form-group">' +
-                '<label for="after">After:</label>' +
-                '<input type="text" class="form-control" id="after" name="after"' +
-                'value="<?= $_GET["after"] ?>"> </div>' +
-
-                '<div class="form-group"> ' +
-                '<label for="limit">Limit:</label> ' +
-                '<input type="text" class="form-control" id="limit" name="limit"' +
-                'value="<?= $_GET["limit"] ?>"> </div>';
-
-            var find_elem = document.createElement('div');
-            find_elem.id = "find";
-            find_elem.innerHTML =
-                '<div class="form-group"> ' +
-                '<label for="currency_id">Currency ID: <span style="color:#ff0000">*</span></label> ' +
-                '<input type="text" class="form-control" id="currency_id" name="currency_id"' +
-                'value="<?= $_GET["currency_id"] ?>"> </div> ';
-
-            var validate_elem = document.createElement('div');
-            validate_elem.id = "validate";
-            validate_elem.innerHTML =
-                '<div class="form-group"> ' +
-                '<label for="currency_id">Currency ID: <span style="color:#ff0000">*</span></label> ' +
-                '<input type="text" class="form-control" id="currency_id" name="currency_id"' +
-                'value="<?= $_GET["currency_id"] ?>"> </div>' +
-
-                '<div class="form-group"> ' +
-                '<label for="address">Address: <span style="color:#ff0000">*</span></label> ' +
-                '<input type="text" class="form-control" id="address" name="address"' +
-                'value="<?= $_GET["address"] ?>"> </div>';
-
-                window.onload = updateValue;
-
-                var form = document.getElementsByClassName("form-temp")[0];
-
-                selectElement.addEventListener('change', updateValue);
-            function updateValue(e) {
-                if (get.value === "list")
-                {
-                    form.innerHTML = "";
-                    form.appendChild(list_elem);
-                } else if (get.value === "find" || get.value === "get_block" || get.value === "icon_retrieve" )
-                {
-                    form.innerHTML = "";
-                    form.appendChild(find_elem);
-                } else if ( get.value === "validate"){
-                    form.innerHTML = "";
-                    form.appendChild(validate_elem);
-                } else {
-                    form.innerHTML = "";
-                }
+    </div>
+    <script>
+        var insertEl =  document.getElementById("insert");
+        const selectElement = document.getElementById("action");
+        selectElement.addEventListener("change", (event) => {
+            document.getElementById('name_code_block').style.display = "none";
+            document.getElementById('type_block').style.display = "none";
+            document.getElementById('capabilities_block').style.display = "none";
+            document.getElementById('after_block').style.display = "none";
+            document.getElementById('limit_block').style.display = "none";
+            document.getElementById('currency_id_block').style.display = "none";
+            document.getElementById('address_block').style.display = "none";
+            if (selectElement.value == 'Currencies list'){
+                document.getElementById('name_code_block').style.display = "block";
+                document.getElementById('type_block').style.display = "block";
+                document.getElementById('capabilities_block').style.display = "block";
+                document.getElementById('after_block').style.display = "block";
+                document.getElementById('limit_block').style.display = "block";
             }
-        </script>
+            else if (selectElement.value == 'Find a currency by its ID' || selectElement.value == 'Get the latest block number by currency' ||
+                selectElement.value == 'Retrieve the currency icon' || selectElement.value == 'Retrieve the currency icon as svg'){
+                document.getElementById('currency_id_block').style.display = "block";
+            }
+            else if (selectElement.value == 'Validation'){
+                document.getElementById('currency_id_block').style.display = "block";
+                document.getElementById('address_block').style.display = "block";
+            }
+        });
+    </script>
+
+    <button type="submit" class="btn btn-default">Submit</button>
+    </form>
     </div>
     <?php
     $params = null;
@@ -145,82 +137,63 @@ function updateValue(e) {
 
     if (!empty($_GET['action'])) {
 
+        $apiUrl = 'https://api.coinpayments.net/api/v1/currencies';
         $method = 'GET';
+        $params = [];
+        $query_builder = [];
+
         switch ($_GET['action']) {
 
-            case 'list':
-                $apiUrl = 'https://api.coinpayments.net/api/v1/currencies';
-                $is = false;
-                if (!(empty($_GET['q']))) {
-                    $apiUrl = $apiUrl . '?q=' . $_GET['q'];
-                    $is = true;
+            case 'Currencies list':
+
+                if (!(empty($_GET['name_code']))) {
+                    $query_builder['q'] = $_GET['name_code'];
                 }
-                if ($_GET['type'] !== "none") {
-                    if ($is)
-                        $apiUrl = $apiUrl . '&types=' . $_GET['type'];
-                    else {
-                        $apiUrl = $apiUrl . '?types=' . $_GET['type'];
-                        $is = true;
-                    }
+                if ($_GET['type'] !== "--") {
+                    $query_builder['types'] = $_GET['type'];
                 }
-                if ($_GET['capability'] !== "none") {
-                    if ($is)
-                        $apiUrl = $apiUrl . '&capabilities=' . $_GET['capability'];
-                    else {
-                        $apiUrl = $apiUrl . '?capabilities=' . $_GET['capability'];
-                        $is = true;
-                    }
+                if ($_GET['capability'] !== "--") {
+                    $query_builder['capabilities'] = $_GET['capability'];
                 }
                 if (!(empty($_GET['after']))) {
-                    if ($is)
-                        $apiUrl = $apiUrl . '&after=' . $_GET['after'];
-                    else {
-                        $apiUrl = $apiUrl . '?after=' . $_GET['after'];
-                        $is = true;
-                    }
+                    $query_builder['after'] = $_GET['after'];
                 }
                 if (!(empty($_GET['limit']))) {
-                    if ($is)
-                        $apiUrl = $apiUrl . '&limit=' . $_GET['limit'];
-                    else {
-                        $apiUrl = $apiUrl . '?limit=' . $_GET['limit'];
-                        $is = true;
-                    }
+                    $query_builder['limit'] = $_GET['limit'];
+                }
+                if (count($query_builder) > 0) {
+                    $apiUrl .= '?' . http_build_query($query_builder);
                 }
-                $params = [];
                 break;
 
-            case 'find':
-                $apiUrl = 'https://api.coinpayments.net/api/v1/currencies/' . $_GET['currency_id'];
-                $params = [];
+            case 'Find a currency by its ID':
+                $apiUrl .= '/' . $_GET['currency_id'];
                 break;
 
-            case 'get_block':
-                $apiUrl = 'https://api.coinpayments.net/api/v1/currencies/blockchain-nodes/' . $_GET['currency_id'] . '/latest-block-number';
-                $params = [];
+            case 'Get the latest block number by currency':
+                $apiUrl .= '/' . $_GET['currency_id'] . '/latest-block-number';
                 break;
 
-            case 'get_req':
-                $apiUrl = 'https://api.coinpayments.net/api/v1/currencies/required-confirmations';
-                $params = [];
+            case 'Get the required confirmations for each currency':
+                $apiUrl .= '/required-confirmations';
                 break;
 
-            case 'icon_retrieve':
-                $apiUrl = 'https://api.coinpayments.net/api/v1/currencies/' . $_GET['currency_id'] . '/logo';
-                $params = [];
+            case 'Retrieve the currency icon':
+                $apiUrl .= '/' . $_GET['currency_id'] . '/logo';
+                break;
+
+            case 'Retrieve the currency icon as svg':
+                $apiUrl .= '/' . $_GET['currency_id'] . '/logosvg';
                 break;
 
             case 'conversions':
-                $apiUrl = 'https://api.coinpayments.net/api/v1/currencies/conversions';
-                $params = [];
+                $apiUrl .= '/conversions';
                 break;
 
             case 'validate':
-                $apiUrl = 'https://api.coinpayments.net/api/v1/currencies/' . $_GET['currency_id'] . "/" . $_GET['address'] . "/validate";
-                $params = [];
+                $apiUrl .= '/' . $_GET['currency_id'] . "/" . $_GET['address'] . "/validate";
                 break;
         }
-
         $response = sendRequest($method, $apiUrl, $_GET['clientId'], $_GET['clientSecret'], $date, $params);
 
         echo "<pre>";
@@ -289,4 +262,4 @@ function signature($method, $apiUrl, $clientId, $date, $clientSecret, $params)
     ]);
 
     return base64_encode(hash_hmac('sha256', $signatureString, $clientSecret, true));
-}
\ No newline at end of file
+}
