diff --git a/src/angular-advanced-searchbox.css b/src/angular-advanced-searchbox.css
index 5132212..09a96dc 100644
--- a/src/angular-advanced-searchbox.css
+++ b/src/angular-advanced-searchbox.css
@@ -71,7 +71,7 @@
 
     .advancedSearchBox .search-parameter-input {
         display: inline-block;
-        width: auto;
+        width: 100px;
         height: 24px;
         border: 0;
         margin: 0;
@@ -107,4 +107,4 @@
             cursor: pointer;
             background-color: #bdbdbd;
             color: #fff;
-        }
\ No newline at end of file
+        }
diff --git a/src/angular-advanced-searchbox.html b/src/angular-advanced-searchbox.html
index 8c65771..dda9597 100644
--- a/src/angular-advanced-searchbox.html
+++ b/src/angular-advanced-searchbox.html
@@ -1,44 +1,68 @@
 <div class="advancedSearchBox" ng-class="{active:focus}" ng-init="focus = false" ng-click="!focus ? setSearchFocus = true : null">
-    <span ng-show="searchParams.length < 1 && searchQuery.length === 0" class="search-icon glyphicon glyphicon-search"></span>
-    <a ng-href="" ng-show="searchParams.length > 0 || searchQuery.length > 0" ng-click="removeAll()" role="button">
-        <span class="remove-all-icon glyphicon glyphicon-trash"></span>
-    </a>
-    <div>
-        <div class="search-parameter" ng-repeat="searchParam in searchParams">
-            <a ng-href="" ng-click="removeSearchParam($index)" role="button">
-                <span class="remove glyphicon glyphicon-trash"></span>
-            </a>
-            <div class="key">{{searchParam.name}}:</div>
-            <div class="value">
-                <span ng-if="!searchParam.editMode" ng-click="enterEditMode($index)">{{searchParam.value}}</span>
-                <input name="value"
-                       type="text"
-                       nit-auto-size-input
-                       nit-set-focus="searchParam.editMode"
-                       ng-keydown="keydown($event, $index)"
-                       ng-blur="leaveEditMode($index)"
-                       ng-if="searchParam.editMode"
-                       ng-change="searchParamValueChanged(searchParam)"
-                       ng-model="searchParam.value"
-                       placeholder="{{searchParam.placeholder}}" />
-            </div>
-        </div>
-        <input name="searchbox"
-               class="search-parameter-input"
-               type="text"
-               nit-auto-size-input
-               nit-set-focus="setSearchFocus"
-               ng-keydown="keydown($event)"
-               placeholder="{{placeholder}}"
-               ng-focus="focus = true"
-               ng-blur="focus = false"
-               typeahead-on-select="typeaheadOnSelect($item, $model, $label)"
-               typeahead="parameter as parameter.name for parameter in parameters | filter:isUnsedParameter | filter:{name:$viewValue} | limitTo:8"
-               ng-change="searchQueryChanged(searchQuery)"
-               ng-model="searchQuery" />
-    </div>
-    <div class="search-parameter-suggestions" ng-show="parameters && focus">
-        <span class="title">Parameter Suggestions:</span>
-        <span class="search-parameter" ng-repeat="param in parameters | filter:isUnsedParameter | limitTo:8" ng-mousedown="addSearchParam(param)">{{param.name}}</span>
-    </div>
-</div>
\ No newline at end of file
+    <form ng-submit="Enter()">
+       <span ng-show="isDefault() && searchQuery.length === 0" class="search-icon fa fa-search"></span>
+       <a ng-href="" ng-hide="isDefault() && searchQuery.length === 0" ng-click="removeAll()" role="button">
+           <span class="remove-all-icon fa fa-refresh"></span>
+       </a>
+       <div>
+           <div class="search-parameter" ng-repeat="searchParam in searchParams">
+               <a ng-href="" ng-click="removeSearchParam($index)" role="button" ng-hide="searchParam.required">
+                   <span class="remove fa fa-trash"></span>
+               </a>
+               <a ng-href="" ng-click="" role="button" ng-show="searchParam.required">
+                   <span class="remove"></span>
+               </a>
+               <div class="key">{{searchParam.name}}:</div>
+               <div class="value" ng-if="searchParam.type != 'list'">
+                   <span ng-if="!searchParam.editMode" ng-click="enterEditMode($index)">&nbsp;{{(searchParam.type == 'date') ? (searchParam.value| date: "yyyy-MM-dd"): searchParam.value}}</span>
+                   <input name="value"
+                            type="{{searchParam.type}}"
+                          ng-model-options="{ timezone: '+0000' }"
+                          nit-set-focus="searchParam.editMode"
+                          ng-keydown="keydown($event, $index)"
+                          ng-blur="leaveEditMode($index)"
+                          ng-if="searchParam.editMode"
+                          ng-change="searchParamValueChanged(searchParam)"
+                          ng-model="searchParam.value"
+                          placeholder="{{searchParam.placeholder}}" />
+                          <!-- 
+                          ng-model-options="{ timezone : '+0000'}"
+                          nit-auto-size-input
+                          -->
+               </div>
+               <div class="value" ng-if="searchParam.type == 'list'">
+                  <span ng-if="!searchParam.editMode" ng-click="enterEditMode($index)">&nbsp;{{searchParam.value.cname || searchParam.value.name}}</span>
+                     <select 
+                          nit-set-focus="searchParam.editMode"
+                          ng-keydown="keydown($event, $index)"
+                          ng-blur="leaveEditMode($index)"
+                          ng-if="searchParam.editMode"
+                          ng-change="searchParamValueChanged(searchParam)"
+                          ng-model="searchParam.value" 
+                          ng-options="m.cname || m.name for m in searchParam.options"
+                          />
+                          <!-- ng-init="searchParam.value = searchParam.options[0]" -->
+                          
+                     </select>
+             </div>
+           </div>
+           <input name="searchbox"
+                  class="search-parameter-input"
+                  type="text"
+                  nit-auto-size-input
+                  nit-set-focus="setSearchFocus"
+                  ng-keydown="keydown($event)"
+                  placeholder="{{placeholder}}"
+                  ng-focus="focus = true"
+                  ng-blur="focus = false"
+                  typeahead-on-select="typeaheadOnSelect($item, $model, $label)"
+                  typeahead="parameter as parameter.name for parameter in parameters | filter:isUnsedParameter | filter:{name:$viewValue} | limitTo:8"
+                  ng-change="searchQueryChanged(searchQuery)"
+                  ng-model="searchQuery" />
+       </div>
+       <div class="search-parameter-suggestions" ng-show="(parameters | filter:isUnsedParameter).length && focus">
+           <span class="title">Parameter Suggestions:</span>
+           <span class="search-parameter" ng-repeat="param in parameters | filter:isUnsedParameter | limitTo:8" ng-mousedown="addSearchParam(param)">{{param.name}}</span>
+     </div>
+  </form>
+</div>
diff --git a/src/angular-advanced-searchbox.js b/src/angular-advanced-searchbox.js
index 8e2318b..b8c3857 100644
--- a/src/angular-advanced-searchbox.js
+++ b/src/angular-advanced-searchbox.js
@@ -17,6 +17,8 @@ angular.module('angular-advanced-searchbox', [])
             scope: {
                 model: '=ngModel',
                 parameters: '=',
+                defaultparams: '=',
+                enter: '=',
                 placeholder: '@'
             },
             replace: true,
@@ -29,11 +31,23 @@ angular.module('angular-advanced-searchbox', [])
                     $scope.searchParams = [];
                     $scope.searchQuery = '';
                     $scope.setSearchFocus = false;
+                    $scope.Enter = $scope.enter;
                     var searchThrottleTimer;
                     var changeBuffer = [];
+                    if ($scope.defaultparams) {
+                       if (!$scope.defaultparams.query) {
+                          $scope.defaultparams.query = '';
+                       }
+                    } else {
+                        $scope.defaultparams = {};
+                    }
+                    $scope.model = angular.copy($scope.defaultparams);
 
-                    $scope.$watch('model', function (newValue, oldValue) {
+                    $scope.$watch('defaultparams', function () {
+                       $scope.model = angular.copy($scope.defaultparams);
+                    });
 
+                    $scope.$watch('model', function (newValue, oldValue) {
                         if(angular.equals(newValue, oldValue))
                             return;
 
@@ -62,6 +76,9 @@ angular.module('angular-advanced-searchbox', [])
                         });
                     }, true);
 
+                    $scope.isDefault = function () {
+                        return angular.equals($scope.defaultparams, $scope.model);
+                    };
                     $scope.searchParamValueChanged = function (param) {
                         updateModel('change', param.key, param.value);
                     };
@@ -76,6 +93,7 @@ angular.module('angular-advanced-searchbox', [])
 
                         var searchParam = $scope.searchParams[index];
                         searchParam.editMode = true;
+                        $scope.focus = true; // by GatorLiu
                     };
 
                     $scope.leaveEditMode = function(index) {
@@ -112,11 +130,18 @@ angular.module('angular-advanced-searchbox', [])
                                 key: searchParam.key,
                                 name: searchParam.name,
                                 placeholder: searchParam.placeholder,
+                                type: searchParam.type, // GatorLiu
+                                options : searchParam.options, // GatorLiu
+                                required:searchParam.required,
                                 value: value || '',
                                 editMode: enterEditModel
                             }
                         );
-
+                        if (value === undefined) {
+                           $timeout( function(){
+                              $scope.focus = true;
+                           });
+                        }
                         updateModel('add', searchParam.key, value);
                     };
 
@@ -125,6 +150,7 @@ angular.module('angular-advanced-searchbox', [])
                             return;
 
                         var searchParam = $scope.searchParams[index];
+                        if (searchParam.required) return;
                         $scope.searchParams.splice(index, 1);
 
                         updateModel('delete', searchParam.key);
@@ -135,6 +161,8 @@ angular.module('angular-advanced-searchbox', [])
                         $scope.searchQuery = '';
                         
                         $scope.model = {};
+                        $scope.model= angular.copy($scope.defaultparams);
+                        $scope.focus = false;
                     };
 
                     $scope.editPrevious = function(currentIndex) {
@@ -142,10 +170,14 @@ angular.module('angular-advanced-searchbox', [])
                             $scope.leaveEditMode(currentIndex);
 
                         //TODO: check if index == 0 -> what then?
+                        //console.log(currentIndex)
                         if (currentIndex > 0) {
                             $scope.enterEditMode(currentIndex - 1);
+                        //} else if (currentIndex === undefined) {
+                        //    $scope.enterEditMode($scope.searchParams.length - 1);
                         } else if ($scope.searchParams.length > 0) {
                             $scope.enterEditMode($scope.searchParams.length - 1);
+                        //    $scope.setSearchFocus = true;
                         }
                     };
 
@@ -167,12 +199,32 @@ angular.module('angular-advanced-searchbox', [])
                         var handledKeys = [8, 9, 13, 37, 39];
                         if (handledKeys.indexOf(e.which) === -1)
                             return;
-
-                        var cursorPosition = getCurrentCaretPosition(e.target);
+/* 
+ * Most browsers( IE, firefox, safari..) not suport html5 input type 'date',
+                        if (e.target.type == 'date'){
+                           if (e.which == 13) { // enter
+                              $scope.editNext(searchParamIndex);
+                           }
+                           return;
+                        }
+*/
+                        var notSupportType;
+                        var cursorPosition;
+                        try{
+                           notSupportType  = false;
+                           cursorPosition = getCurrentCaretPosition(e.target);
+                        } catch(err) {
+                           notSupportType = true; 
+                        }
 
                         if (e.which == 8) { // backspace
-                            if (cursorPosition === 0)
-                                $scope.editPrevious(searchParamIndex);
+                            if ( notSupportType || cursorPosition === 0) {
+                                e.preventDefault();
+                                if (searchParamIndex === 0)
+                                    $scope.editNext(searchParamIndex);
+                                else
+                                    $scope.editPrevious(searchParamIndex);
+                            }
 
                         } else if (e.which == 9) { // tab
                             if (e.shiftKey) {
@@ -236,6 +288,7 @@ angular.module('angular-advanced-searchbox', [])
                             });
 
                             changeBuffer.length = 0;
+                            //$scope.focus = true; // by GatorLiu for <select> Click 
                         }, 500);
                     }