仿天猫商城鼠标移近图片变暗的jquery特效代码

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600"  creationComplete="application1_creationCompleteHandler()">
<s:layout>
<s:BasicLayout/>
</s:layout>
<fx:Declarations>
<!-- 将非可视元素（例如服务、值对象）放在此处 -->
</fx:Declarations>
<fx:Script>
<![CDATA[
import com.adobe.viewsource.ViewSource;

import mx.controls.Alert;
import mx.events.FlexEvent;

protected function application1_creationCompleteHandler():void
{
var contextMenu : ContextMenu = new ContextMenu();
/* var inItems:ContextMenuBuiltInItems = contextMenu.builtInItems;
inItems.forwardAndBack = false;
inItems.play = false;
inItems.print = false;
inItems.loop = false;
inItems.quality = false;
inItems.rewind = false;
inItems.save = false;
inItems.zoom = false; */

contextMenu.hideBuiltInItems(); // 隐藏一些内建的鼠标右键菜单项
var contextMenuItem : ContextMenuItem = new ContextMenuItem("delete button");
contextMenu.customItems.push(contextMenuItem);
contextMenuItem.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT,Handler);
btnMenu.contextMenu = contextMenu; // 这里的this为Application对象  this可以换成其他组件
}

private function Handler(event:ContextMenuEvent):void{
Alert.show("test menu");
}

]]>
</fx:Script>

<s:Button id="btnMenu" x="186" y="113" label="测试菜单"/>
</s:Application>