需求是鼠标移动到相应的DATAGRID的条目时出现该产品的图片，并且图片跟着鼠标的移动而移动

1. var titleWindow:TitleWindow; 
2.             var img:Image; 
3.             protected function dataGrid_itemRollOverHandler(event:ListEvent):void 
4.             { 
5.                  
6. //              var posmodelVO:PosModelVO=dataProvider.getItemAt(event.rowIndex) as PosModelVO; 
7.                 var posmodelVO:PosModelVO=event.itemRenderer.data as PosModelVO 
8.                 if(titleWindow==null){ 
9.                     titleWindow=new TitleWindow(); 
10.                     img=new Image 
11.                     img.width=100; 
12.                     img.height=133; 
13.                     img.maintainAspectRatio=false; 
14.                     titleWindow.addElement(img); 
15.                     titleWindow.width=110; 
16.                     titleWindow.height=145; 
17.                     titleWindow.setStyle("headerHeight","0"); 
18.                     titleWindow.setStyle('borderSides','solid'); 
19.                     titleWindow.setStyle('borderThickness','3'); 
20.                     PopUpManager.addPopUp(titleWindow,this,false); 
21.                 } 
22.                     if(posmodelVO.p_w_picpath!=null){ 
23.                         titleWindow.visible=true; 
24.                         img.source=posmodelVO.p_w_picpath; 
25.                         titleWindow.x=mouseX; 
26.                         titleWindow.y=mouseY; 
27.                     }else { 
28.                         titleWindow.visible=false; 
29.                     } 
30.             }