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分享function listNorthStates()
{
var xmlDoc=xmlHttp.responseXML;
var northNode=xmlDoc.getElementsByTagName("north")[0];
//var out="Northern States";
var northStates=northNode.getElementsByTagName("state");
outputList("Northern States ",northStates);
}
function listAllStates()
{
var xmlDoc=xmlHttp.responseXML;
var allStates=xmlDoc.getElementsByTagName("state");
outputList("All States in Document",allStates);
}