var _bbb={};
_bbb.xml={
  node:function(_xml,_name){try{return _xml.getElementsByTagName(_name)[0];}catch(e){return null;}},
  subnode:function(_node,_name){if(!_node)return null;var _list = _node.childNodes;if(!_list || _list.length==0)return null;for(var i=0;i<_list.length;i++){if(_list[i].nodeName==_name)return _list[i];}return null;},
  value:function(_node){try{return _node.childNodes[0].data;}catch(e){return '';}},
  subvalue:function(_node,_name){return _bbb.xml.value(_bbb.xml.node(_node,_name));},
  error:function(_doc){try{var _error = _bbb.xml.value(_bbb.xml.node(_doc,'error'));if(!_error || _error=='')return 'false';return _error;}catch(e){return 'false';}}
};
_bbb.ajax={
  get:function(){var xmlhttp;try{var xmlhttp=new ActiveXObject("msxml2.xmlhttp");}catch(error_0){try{var xmlhttp=new ActiveXObject("microsoft.xmlhttp");}catch(error_1){var xmlhttp=new XMLHttpRequest();}}if(!xmlhttp){alert('您的浏览器不支持xmlhttp，所以无法使用此功能。');}return xmlhttp;},
  post:function(_url,_para,_callback,_props){var _ajax = _bbb.ajax.get();if(_ajax){_ajax.open('post', _url,true);_ajax.setRequestHeader("Content-Type","application/x-www-form-urlencoded;charset=UTF-8");_ajax.onreadystatechange=function(){if (_ajax.readyState==4) {if(_callback && _callback!=null){_callback(_ajax,_props);}}};_ajax.send(_para);}}
};