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将flex 中的某个组件放到显示列表顶层

12.15.2007
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        // description of your code here

function toTop(obj:UIComponent):void{
		
			if(obj.parent){
			  var parent:UIComponent = UIComponent(obj.parent);
				parent.swapChildren(obj,parent.getChildAt(parent.numChildren-1));
				if(!(parent is Application)){
					toTop(parent);
				}
			}
		}