added update

src/stwkit.js

@@ -28,6 +28,13 @@ var STWkit = {
         }
         return -1;
     },
+    updateUrl: function(params) {
+        var search = STWkit.getSearchUrl(param);
+        if (history.pushState) {
+            var newurl = window.location.protocol + "//" + window.location.host + window.location.pathname + search;
+            window.history.pushState({ path: newurl }, '', newurl);
+        }                                
+    },
     getSearchUrl:  function(params) {
         var search = "";
         if (params.length > 0) search += "?";