phpeveryday.com

function handleXMLData()
{
 
  var xmlResponse = xmlHttp.responseXML;
  
  // error handling for IE and Opera
  if (!xmlResponse || !xmlResponse.documentElement){
    throw("1. Invalid XML Structure:\n " + xmlHttp.responseText);
  }
  
  var rootNodeName = xmlResponse.documentElement.nodeName;    
  //error handling for Firefox
  if (rootNodeName == "parseerror"){
    throw("2. Invalid XML Structure:\n " + xmlHttp.responseText);
  }

  var xmlRoot = xmlResponse.documentElement;
  
  if(rootNodeName != "datas" || !xmlRoot.firstChild){
    throw("3. Invalid XML Structure:\n " + xmlHttp.responseText);  
  }
  
  var xmlData = xmlRoot.firstChild;
  var dataNodeName = xmlData.nodeName;
  if (dataNodeName != "calculation"){
    throw("4. Invalid XML Structure:\n " + xmlHttp.responseText);    
  }
 
 myDiv = document.getElementById("myDivElement"); 
 myDiv.innerHTML += "Request status: 4 (complete). <br />Server said: "; 
 myDiv.innerHTML += xmlHttp.responseText;
 
}