diff --git a/ui/new/jsp/tab_instance.jsp b/ui/new/jsp/tab_instance.jsp
index a5419a2c4a9..dab3bf47117 100755
--- a/ui/new/jsp/tab_instance.jsp
+++ b/ui/new/jsp/tab_instance.jsp
@@ -597,7 +597,7 @@
 <!-- Attach ISO Dialog -->
 <div id="dialog_attach_iso" title="Attach ISO" style="display:none">
     <p>
-        Please specify the ISO you wish to attach to your Virtual Instance(s).
+        Please specify the ISO you wish to attach to virtual instance.
     </p>
     <div class="dialog_formcontent">
         <form action="#" method="post" id="form_acquire">
@@ -617,7 +617,7 @@
 <!-- Change Name Dialog -->
 <div id="dialog_change_name" title="Change Name" style="display:none">
     <p>
-        Please specify the new name you want to change for your Virtual Instance(s).
+        Please specify the new name you want to change for virtual instance.
     </p>
     <div class="dialog_formcontent">
         <form action="#" method="post" id="form_acquire">
@@ -632,4 +632,23 @@
         </ol>
         </form>
     </div>
+</div>
+
+<!-- Change Service Offering Dialog -->
+<div id="dialog_change_service_offering" title="Change Service Offering" style="display:none">
+    <p>  
+        After changing service offering, you must restart virtual instance for the new service offering to take effect.
+    </p>
+    <div class="dialog_formcontent">
+        <form action="#" method="post" id="form_acquire">
+        <ol>
+            <li>
+                <label for="user_name">
+                    Service Offering:</label>
+                <select class="select" name="change_service_offerings" id="change_service_offerings">
+                </select>
+            </li>
+        </ol>
+        </form>
+    </div>
 </div>
\ No newline at end of file
diff --git a/ui/new/scripts/cloud.core.instance.js b/ui/new/scripts/cloud.core.instance.js
index 3c620c7cb82..61236f8cd9d 100755
--- a/ui/new/scripts/cloud.core.instance.js
+++ b/ui/new/scripts/cloud.core.instance.js
@@ -73,6 +73,12 @@ function clickInstanceGroupHeader($arrowIcon) {
             isAsyncJob: false,            
             dialogBeforeActionFn : doChangeName,
             afterActionSeccessFn: setMidmenuItemVm
+        },
+        "Change Service": {
+            isAsyncJob: true,
+            asyncJobResponse: "changeserviceforvirtualmachineresponse",
+            dialogBeforeActionFn : doChangeService,
+            afterActionSeccessFn: setMidmenuItemVm
         }          
     }            
         
@@ -185,6 +191,47 @@ function clickInstanceGroupHeader($arrowIcon) {
 		}).dialog("open");
     }
    
+    function doChangeService($t, selectedItemIds, listAPIMap) { 
+		$.ajax({
+		    //data: createURL("command=listServiceOfferings&VirtualMachineId="+vmId), //can not specifiy VirtualMachineId since we allow multiple-item-selection.
+		    data: createURL("command=listServiceOfferings"), //can not specifiy VirtualMachineId since we support multiple-item-selection.
+			dataType: "json",
+			success: function(json) {
+				var offerings = json.listserviceofferingsresponse.serviceoffering;
+				var offeringSelect = $("#dialog_change_service_offering #change_service_offerings").empty();
+				
+				if (offerings != null && offerings.length > 0) {
+					for (var i = 0; i < offerings.length; i++) {
+						var option = $("<option value='" + offerings[i].id + "'>" + sanitizeXSS(unescape(offerings[i].displaytext)) + "</option>").data("name", sanitizeXSS(unescape(offerings[i].name)));
+						offeringSelect.append(option); 
+					}
+				} 
+			}
+		});
+		
+		$("#dialog_change_service_offering")
+		.dialog('option', 'buttons', { 						
+			"Change": function() { 
+			    var thisDialog = $(this);
+				thisDialog.dialog("close"); 
+				
+				for(var id in selectedItemIds) {				
+				    var $midMenuItem = selectedItemIds[id];
+				    var jsonObj = $midMenuItem.data("jsonObj");				
+				    if(jsonObj.state != "Stopped") {				    
+				        $midMenuItem.find("#info_icon").addClass("error").show();
+                        $midMenuItem.data("afterActionInfo", ($t.data("label") + " action failed. Reason: virtual instance needs to be stopped before you can change its service."));  
+			            continue;
+		            }
+                    var apiCommand = "command=changeServiceForVirtualMachine&id="+id+"&serviceOfferingId="+thisDialog.find("#change_service_offerings").val();	     
+                    doAction(id, $t, apiCommand, listAPIMap);
+                }
+			}, 
+			"Cancel": function() { 
+				$(this).dialog("close"); 
+			} 
+		}).dialog("open");
+     }
    
    
     function updateVirtualMachineStateInRightPanel(state) {
@@ -389,6 +436,13 @@ function clickInstanceGroupHeader($arrowIcon) {
 		    zIndex: 2000
 	    }));
         
+        activateDialog($("#dialog_change_service_offering").dialog({ 
+		    width: 600,
+		    autoOpen: false,
+		    modal: true,
+		    zIndex: 2000
+	    }));
+        
         //***** VM Wizard (begin) ******************************************************************************
         $vmPopup = $("#vm_popup");
         var $serviceOfferingTemplate = $("#vm_popup_service_offering_template");
diff --git a/ui/new/scripts/cloud.core.js b/ui/new/scripts/cloud.core.js
index 8702a733baa..d65d01b054a 100755
--- a/ui/new/scripts/cloud.core.js
+++ b/ui/new/scripts/cloud.core.js
@@ -86,8 +86,18 @@ function doAction(id, $t, apiCommand, listAPIMap) {
 		                        $midmenuItem.find("#content").removeClass("inaction");
 		                        $midmenuItem.find("#spinning_wheel").hide();	
 		                        $midmenuItem.find("#info_icon").addClass("error").show();	
-		                        $midmenuItem.data("afterActionInfo", (label + " action failed."));    	                        
-		                        handleError(XMLHttpResponse);
+		                        
+		                        var errorMsg = "";
+                                if(XMLHttpResponse.responseText != null & XMLHttpResponse.responseText.length > 0) {
+                                    var start = XMLHttpResponse.responseText.indexOf("h1") + 3;
+                                    var end = XMLHttpResponse.responseText.indexOf("</h1");
+                                    errorMsg = XMLHttpResponse.responseText.substring(start, end);		
+                                }
+                                if(errorMsg.length > 0) 
+                                    $midmenuItem.data("afterActionInfo", ((label + " action failed. Reason: " + sanitizeXSS(unescape(errorMsg)))));    
+                                else
+                                    $midmenuItem.data("afterActionInfo", (label + " action failed."));       	                        
+		                        //handleError(XMLHttpResponse);
 	                        }
                         });
                     },
@@ -98,8 +108,19 @@ function doAction(id, $t, apiCommand, listAPIMap) {
                 $midmenuItem.find("#content").removeClass("inaction");
 		        $midmenuItem.find("#spinning_wheel").hide();	
 		        $midmenuItem.find("#info_icon").addClass("error").show();	
-		        $midmenuItem.data("afterActionInfo", (label + " action failed."));    	     
-                handleError(XMLHttpResponse);
+		        $midmenuItem.data("afterActionInfo", (label + " action failed."));  
+		        
+		        var errorMsg = "";
+                if(XMLHttpResponse.responseText != null & XMLHttpResponse.responseText.length > 0) {
+                    var start = XMLHttpResponse.responseText.indexOf("h1") + 3;
+                    var end = XMLHttpResponse.responseText.indexOf("</h1");
+                    errorMsg = XMLHttpResponse.responseText.substring(start, end);		
+                }
+                if(errorMsg.length > 0) 
+                    $midmenuItem.data("afterActionInfo", ((label + " action failed. Reason: " + sanitizeXSS(unescape(errorMsg)))));    
+                else
+                    $midmenuItem.data("afterActionInfo", (label + " action failed."));      	     
+                //handleError(XMLHttpResponse);
             }
         });     
     }