Flash读取Jsp里的值的问题

我有一个Flash提供一个读取Xml的方法:方法如下
function readNewsXml()
{
    var my_xml = new XML();
    my_xml.ignoreWhite = true;
    my_xml.onLoad = function (success)
    {
        xml_loading_mc1._visible = xml_loading_mc2._visible = xml_loading_mc3._visible = false;
        mainTag = my_xml.firstChild;
        var _loc4 = mainTag.childNodes.length;
        for (var _loc3 = 0; _loc3 < _loc4; ++_loc3)
        {
            var _loc2 = list_mc.attachMovie("news_item", "news_item" + _loc3, list_mc.getNextHighestDepth());
            _loc2._y = _loc3 * 25;
            _loc2.bg_mc._alpha = 100;
_loc2.txt1.text = leftx(mainTag.childNodes[_loc3].childNodes[0].firstChild.nodeValue, 12);
            _loc2.txt2.text = leftx(mainTag.childNodes[_loc3].childNodes[1].firstChild.nodeValue, 15);
            _loc2.link = mainTag.childNodes[_loc3].childNodes[2].firstChild.nodeValue;
            _loc2.onRollOver = function ()
            {
        &n