handle empty email field onBlur event correctly

ddportfolioservice/templates/showformscript.mako

@@ -65,7 +65,12 @@ function updateFields(data, textStatus) {
     }
 }
 
+function onChangeShowAll(event) {
+  alert(event);
+}
+
 function onBlurEmail() {
+    if ($.trim($('#email').attr('value')).length > 0) {
         $.ajax({
             'url' : '${h.url_for(action='fetchdddata')}',
             'data' : {'email' : $('#email').attr('value')},
@@ -76,6 +81,7 @@ function onBlurEmail() {
             }
         });
     }
+}
 
 $(document).ready(function() {
     var fields = new Array(