สอบถามการเรียกใช้งานตัวแปร ของJavaScript หรือ jQuery

function SceneVideoPlayerPartial(options){
                this.playList = [{
                                url: 'http://www.t.com/vdo/mn.mp4',
                                title: 'vdo 1',
                },{
                                url: 'http://www.t.com/vdo/mm.mp4',
                                title: 'vdo 2'
                }];
                function convCoord(val, baseResol) {
                                var rate = curWidget.height / baseResol;
                                return parseInt(val*rate, 10);
                }
}

function SceneVideoPlayerPartial(options){
                this.playList = [];
                $.ajax({
       type: "get"
       ,dataType: "xml"
       ,url: "http://www.sm.com/rss/vdo.xml"
       ,success: function(xml){
                                                alert("ParseForMobileXML $(xml).find(item).length > "+$(xml).find("item").length);
                                                if($(xml).find("item").length > 0){ // null check
                                                                $(xml).find("item").each(function(){ // loop
                                                                                var t_title = $(this).find("title").text();
                                                                                var t_description = $(this).find("description").text();  
                                                                                var t_enclosure =  $(this).find("enclosure").attr('url');
                                                                                this.playList.push({
                                                                                                url: t_enclosure,
                                                                                                description: t_description,
                                                                                                title: t_title
                                                                                });
                                                                });//end loop
                                                }// end null check
                                }//end success
        ,error: function(){ alert("Read xml ["+url+"] error!!"); }
    });
}