diff --git a/include/ws_core.inc.php b/include/ws_core.inc.php
index 78cb5064c..3e1db6647 100644
--- a/include/ws_core.inc.php
+++ b/include/ws_core.inc.php
@@ -572,6 +572,10 @@ Request format: ".@$this->_requestFormat." Response format: ".@$this->_responseF
       {
         $param_data['defaultValue'] = $options['default'];
       }
+      if (isset($options['info']))
+      {
+        $param_data['info'] = $options['info'];
+      }
       $res['params'][] = $param_data;
     }
     return $res;
diff --git a/tools/ws.htm b/tools/ws.htm
index ac5844675..f8270535b 100644
--- a/tools/ws.htm
+++ b/tools/ws.htm
@@ -4,7 +4,9 @@
   <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
   <title>Piwigo web API (web-services) explorer</title>
   
+  <link rel="stylesheet" type="text/css" href="http://cdn.jsdelivr.net/tiptip/1.3/tipTip.css">
   <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
+  <script type="text/javascript" src="https://cdn.jsdelivr.net/tiptip/1.3/jquery.tipTip.minified.js"></script>
   
   <style type="text/css">
   /* BEGIN CSS RESET
@@ -92,6 +94,9 @@
   }
   a.button:hover {color:#E5FF00;}
   
+  .methodInfo {float:right;display:inline-block;width:16px;height:16px;font-size:12px;line-height:16px;background:#555;border-radius:8px;font-family:"Times New Roman",sans-serif;font-style:italic;font-weight:bold;text-align:center;color:#fff;}
+  .methodInfo:hover {border:none;text-shadow:none;background:#888;cursor:pointer;color:#fff;}
+  
   #iframeWrapper {width:100%;height:300px;padding:3px 3px 20px 3px;background:#F9F9F9;border:1px solid #cdcdcd;overflow:hidden;position:relative;}
   iframe {width:100%;height:100%;background:#fff;}
   </style>
@@ -408,6 +413,7 @@ function fillNewMethod(methodName) {
       var isOptional = method.params[i].optional;
       var acceptArray = method.params[i].acceptArray;
       var defaultValue = method.params[i].defaultValue == null ? '' : method.params[i].defaultValue;
+      var info = method.params[i].info == null ? '' : '<a class="methodInfo" title="'+ method.params[i].info + '">i</a>';
       
       // if an array is direclty printed, the delimiter is a comma where we use a pipe
       if (typeof defaultValue == 'object') {
@@ -415,7 +421,7 @@ function fillNewMethod(methodName) {
       }
 
       methodParams+= '<tr>'+
-        '<td>'+ method.params[i].name +'</td>'+
+        '<td>'+ method.params[i].name + info +'</td>'+
         '<td class="mini">'+ (isOptional ? '?':'*') + (acceptArray ? ' []':'') +'</td>'+
         '<td class="input"><input type="text" class="methodParameterValue" data-id="'+ i +'" value="'+ defaultValue +'"></td>'+
         '<td class="mini"><input type="checkbox" class="methodParameterSend" data-id="'+ i +'" '+ (isOptional ? '':'checked="checked"') +'></td>'+
@@ -435,6 +441,14 @@ function fillNewMethod(methodName) {
   $("input.methodParameterValue").change(function() {
     $("input.methodParameterSend[data-id='"+ $(this).data('id') +"']").attr('checked', 'checked');
   });
+  
+  // tiptip
+  $(".methodInfo").tipTip({
+    activation:"click",
+    maxWidth:"300px",
+    defaultPosition:"right",
+    delay:0
+  });
 }
 
 // invoke method