5个QQ群里没人解决的Ajax小问题:<ajax基础教程>上的一段代码,请指教~~!

}

else if(requestType=="all")

{

ListAllStates();

}

}

}

}

function ListNorthStates()

{

var xmlDoc=xmlHttp.responseXML;

//如果用xmlHttp.responseText,则可以得到正常的XML文件

var northNode=xmlDoc.getElementsByTagName("north")[0];

var states=northNode.getElementsByTagName("state");

alert(states.length);//这里得出的states.length既然是0

var out="north States";

outPutList(out,states);

}

function ListAllStates()

{

var xmlDoc=xmlHttp.responseXML;

var states=xmlDoc.getElementsByTagName("state");

alert(states.length);//这里得出的states.length也是0

var out="all States";

outPutList(out,states);

}

function outPutList(title,states)

{

var out=title;

var currenState=null;

for(var i=0;i< states.length;i++)

{

currenState=states[i];