FLEX3结合J2EE项目，如何从一个FLEX界面跳转到另外一个FLEX界面

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" creationComplete="init()" xmlns:view = "view.*" horizontalAlign="center" verticalAlign="middle">
<mx:Style source="style.css"/>
    <mx:Script>
        <![CDATA[
            import Model.mod;
            import mx.controls.Alert;

            private var ModShiLi:mod = mod.getshili();
            
            internal function init():void{
                ModShiLi.addEventListener("LOGIN_USER",loginUserHandler);
                ModShiLi.addEventListener("LOGIN_ADMIN",loginAdminHandler);
                ModShiLi.addEventListener("LOGIN_FAILED",loginFailedHandler);
                ModShiLi.addEventListener("ExitUser",ExitUserHandler);
                
                this.currentState = "login";
            }
            internal function loginUserHandler(evt:Event):void{
                this.currentState = "usermain";
            }
            internal function loginAdminHandler(evt:Event):void{
                this.currentState = "adminmain";
            }
            internal function loginFailedHandler(evt:Event):void{
                //Alert.show("用户或密码错误","登录失败");
                hlogin.alt_txt.text="用户或密码错误";
            }
            
            internal function ExitUserHandler(evt:Event):void{
                //this.currentState = "login";
                var url:String = "http://www.meilady.com/csdn/";
   var request:URLRequest = new URLRequest(url);
   navigateToURL(request,'_self'); // 在当前页面跳转
           //navigateToURL(request,'_blank'); //  新窗口

            }
            
        ]]>
    </mx:Script>
            <mx:ApplicationControlBar width="100%" height="70" dock="true" id="applicationcontrolbar1">
                <mx:Canvas>
                <mx:Image source="image/csdnindex_piclogo.gif" x="20"/>
                </mx:Canvas>
                <mx:Label text="csdn设计大赛-工作总结提交系统" fontSize="20" fontWeight="bold" />
            </mx:ApplicationControlBar>
        
<mx:states>
    <mx:State name = "login">
    <mx:AddChild position="lastChild">
        <view:hlogin id="hlogin" />
    </mx:AddChild>
    </mx:State>
    
    <mx:State name = "usermain">
    <mx:AddChild position="lastChild">
        <view:userpanel id="userpanel" />
    </mx:AddChild>
    </mx:State>
    
    <mx:State name = "adminmain">
    <mx:AddChild position="lastChild">
        <view:adminpanel id="adminpanel" />
    </mx:AddChild>
    </mx:State>
    
</mx:states>    
    

<mx:transitions>
    <mx:Transition>
        <mx:Iris xFrom="10"  targets="{[hlogin,userpanel,adminpanel]}"/>
    </mx:Transition>
</mx:transitions>

</mx:Application>

------解决方案--------------------
flex是没有跳转这个概念的。。

如果小项目就用状态。

大项目就要动态加载module····



------解决方案--------------------
慎用Module，
loader.unloadModule();很难卸掉的，反复切换导致的结果就是内存占用越来越大，界面越来越慢，最后内存溢出


------解决方案--------------------
Application.currentstate=''

------解决方案--------------------