flex donet conn

package com.wks.util { ?import com.wks.common; ? ?import flash.net.NetConnection; ? ?import mx.controls.Alert; ? ?public class DonetRemote extends NetConnection ?{ ?? ??private static var DRO:DonetRemote; ?? ??public static function getInstance():DonetRemote ??{ ???if(!DRO) ???{ ????try{ ?????DRO = new DonetRemote(); ?????DRO.connect(common.RemotingAddress); ????}catch(e:Error) ????{ ?????Alert.show(common.ConnError,common.SystemInfo); ????} ???} ??? ???return DRO; ??? ??} ?} }