Merge pull request #78 from OpenSkywalking/fix/71

Fix/71
diff --git a/src/main/resources/static/trace/trace.html b/src/main/resources/static/trace/trace.html
index 57dc064..942de00 100644
--- a/src/main/resources/static/trace/trace.html
+++ b/src/main/resources/static/trace/trace.html
@@ -99,7 +99,7 @@
         <div class="form-group input-group-sm">
             <label>Sort:</label>
             <label class="radio-inline">
-                <input type="radio" id="costSort" value="cost" name="sortColumn" checked="">Cost
+                <input type="radio" id="costSort" value="cost" name="sortColumn" checked="checked">Duration
             </label>
             <label class="radio-inline">
                 <input type="radio" id="timeSort" value="time" name="sortColumn" checked="">Time