package {
    import flash.display.Sprite;
    import flash.text.TextField;
    import flash.events.Event;
    import flash.utils.ByteArray;
    import flash.events.MouseEvent;
    import flash.system.System;
    [SWF(backgroundColor="#ffffff")]
    public class EUCEncode extends Sprite {
        public function EUCEncode() {
            System.useCodePage = false;
            addEventListener(Event.ADDED_TO_STAGE,init);
        }
        private function init(e:Event=null):void {
            var t:String = "ワンダフル";
            t = encodeEUCURI(t);
            var tf:TextField = new TextField();
            tf.autoSize = "left";
            tf.wordWrap = false;
            tf.text = t;
            tf.y = 50;
            addChild(tf);
        }
        public function encodeEUCURI(str:String):String {
            var b:ByteArray = new ByteArray();
            b.writeMultiByte(str,"euc-jp"); //orz
            //return escape2(byteArray2Array(b));
            //△ これも解決しない。
            return escape(b.toString());
        }
        
// ___________________________________________________________   
// http://blog.isocchi.com/2008/08/flexair-actionscripteuc-jpurl.html

public static function byteArray2Array(byteArray:ByteArray):Array {  
    var array:Array = new Array()  
    byteArray.position = 0;  
    while(byteArray.position <= byteArray.length-1) {  
        array.push(byteArray.readByte() & 0x000000FF);  
    }  
    return array;  
}  
public static function escape2(array:Array):String {  
    var result:String = "";  
      
    for(var i:int=0; i<array.length; i++) {  
        result += "%" + (array[i] as int).toString(16);  
    }  
      
    return result.toUpperCase();  
}

// ___________________________________________________________

}
}

EUC-JP URIEncode does not work!!