diff --git a/bi/base.js b/bi/base.js
index 871dd8e95..511fb732d 100644
--- a/bi/base.js
+++ b/bi/base.js
@@ -1135,7 +1135,7 @@ BI.ButtonGroup = BI.inherit(BI.Widget, {
     },
 
     removeItemAt: function (indexes) {
-        BI.remove(this.buttons, indexes);
+        BI.removeAt(this.buttons, indexes);
         this.layouts.removeItemAt(indexes);
     },
 
diff --git a/bi/case.js b/bi/case.js
index ecfa47fc6..3c9e1d261 100644
--- a/bi/case.js
+++ b/bi/case.js
@@ -7181,6 +7181,13 @@ BI.ListPane = BI.inherit(BI.Pane, {
         this.check();
     },
 
+    removeItemAt: function (indexes) {
+        indexes = indexes || [];
+        BI.removeAt(this.options.items, indexes);
+        this.button_group.removeItemAt.apply(this.button_group, arguments);
+        this.check();
+    },
+
     populate: function (items) {
         var self = this, o = this.options;
         if (arguments.length === 0 && (BI.isFunction(this.button_group.attr("itemsCreator")))) {//接管loader的populate方法
diff --git a/bi/core.js b/bi/core.js
index 782e18b6c..744231b76 100644
--- a/bi/core.js
+++ b/bi/core.js
@@ -6374,6 +6374,20 @@ Date.prototype.getQuarterStartMonth = function () {
     }
     return quarterStartMonth;
 };
+
+//指定日期n个月之前或之后的日期
+Date.prototype.getOffsetMonth = function (n) {
+    var dt = new Date(this.getTime());
+    var day = dt.getDate();
+    var monthDay = new Date(dt.getFullYear(), dt.getMonth() + parseInt(n), 1).getMonthDays();
+    if(day > monthDay){
+        day = monthDay;
+    }
+    dt.setDate(day);
+    dt.setMonth(dt.getMonth() + parseInt(n));
+    return dt;
+};
+
 //获得本季度的起始日期
 Date.prototype.getQuarterStartDate = function () {
     return new Date(this.getFullYear(), this.getQuarterStartMonth(), 1);
diff --git a/docs/base.js b/docs/base.js
index 871dd8e95..511fb732d 100644
--- a/docs/base.js
+++ b/docs/base.js
@@ -1135,7 +1135,7 @@ BI.ButtonGroup = BI.inherit(BI.Widget, {
     },
 
     removeItemAt: function (indexes) {
-        BI.remove(this.buttons, indexes);
+        BI.removeAt(this.buttons, indexes);
         this.layouts.removeItemAt(indexes);
     },
 
diff --git a/docs/case.js b/docs/case.js
index ecfa47fc6..3c9e1d261 100644
--- a/docs/case.js
+++ b/docs/case.js
@@ -7181,6 +7181,13 @@ BI.ListPane = BI.inherit(BI.Pane, {
         this.check();
     },
 
+    removeItemAt: function (indexes) {
+        indexes = indexes || [];
+        BI.removeAt(this.options.items, indexes);
+        this.button_group.removeItemAt.apply(this.button_group, arguments);
+        this.check();
+    },
+
     populate: function (items) {
         var self = this, o = this.options;
         if (arguments.length === 0 && (BI.isFunction(this.button_group.attr("itemsCreator")))) {//接管loader的populate方法
diff --git a/docs/core.js b/docs/core.js
index 015d1c47f..429e62f8f 100644
--- a/docs/core.js
+++ b/docs/core.js
@@ -23854,6 +23854,20 @@ Date.prototype.getQuarterStartMonth = function () {
     }
     return quarterStartMonth;
 };
+
+//指定日期n个月之前或之后的日期
+Date.prototype.getOffsetMonth = function (n) {
+    var dt = new Date(this.getTime());
+    var day = dt.getDate();
+    var monthDay = new Date(dt.getFullYear(), dt.getMonth() + parseInt(n), 1).getMonthDays();
+    if(day > monthDay){
+        day = monthDay;
+    }
+    dt.setDate(day);
+    dt.setMonth(dt.getMonth() + parseInt(n));
+    return dt;
+};
+
 //获得本季度的起始日期
 Date.prototype.getQuarterStartDate = function () {
     return new Date(this.getFullYear(), this.getQuarterStartMonth(), 1);
diff --git a/src/base/combination/group.button.js b/src/base/combination/group.button.js
index d303feeeb..2da4ee7fd 100644
--- a/src/base/combination/group.button.js
+++ b/src/base/combination/group.button.js
@@ -158,7 +158,7 @@ BI.ButtonGroup = BI.inherit(BI.Widget, {
     },
 
     removeItemAt: function (indexes) {
-        BI.remove(this.buttons, indexes);
+        BI.removeAt(this.buttons, indexes);
         this.layouts.removeItemAt(indexes);
     },
 
diff --git a/src/case/layer/pane.list.js b/src/case/layer/pane.list.js
index b7faf2758..fcedfc8b3 100644
--- a/src/case/layer/pane.list.js
+++ b/src/case/layer/pane.list.js
@@ -101,6 +101,13 @@ BI.ListPane = BI.inherit(BI.Pane, {
         this.check();
     },
 
+    removeItemAt: function (indexes) {
+        indexes = indexes || [];
+        BI.removeAt(this.options.items, indexes);
+        this.button_group.removeItemAt.apply(this.button_group, arguments);
+        this.check();
+    },
+
     populate: function (items) {
         var self = this, o = this.options;
         if (arguments.length === 0 && (BI.isFunction(this.button_group.attr("itemsCreator")))) {//接管loader的populate方法
diff --git a/src/core/proto/date.js b/src/core/proto/date.js
index 1ae8b5959..e3146708b 100644
--- a/src/core/proto/date.js
+++ b/src/core/proto/date.js
@@ -182,6 +182,20 @@ Date.prototype.getQuarterStartMonth = function () {
     }
     return quarterStartMonth;
 };
+
+//指定日期n个月之前或之后的日期
+Date.prototype.getOffsetMonth = function (n) {
+    var dt = new Date(this.getTime());
+    var day = dt.getDate();
+    var monthDay = new Date(dt.getFullYear(), dt.getMonth() + parseInt(n), 1).getMonthDays();
+    if(day > monthDay){
+        day = monthDay;
+    }
+    dt.setDate(day);
+    dt.setMonth(dt.getMonth() + parseInt(n));
+    return dt;
+};
+
 //获得本季度的起始日期
 Date.prototype.getQuarterStartDate = function () {
     return new Date(this.getFullYear(), this.getQuarterStartMonth(), 1);