[XML][javascript] parcours d un document xml

bonjour
bon j ai un gros probleme de parcours d un fichier xml en javascript
xml file :

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE counties SYSTEM "county.dtd">
<counties>
    <aCounty>
        <county>All Ireland</county>
        <TotalPopulation>5602470</TotalPopulation>
        <TotalMale>2767613</TotalMale>
        <TotalFemale>2834857</TotalFemale>
        <PercPropMale>49,4</PercPropMale>
        <PercPropFemale>50,6</PercPropFemale>
        <DependencyRatio>0,5</DependencyRatio>
        <Pop_0_14>1198380</Pop_0_14>
        <Pop_15_24>880108</Pop_15_24>
        <Pop_25_44>1669454</Pop_25_44>
        <Pop_45_65>1195202</Pop_45_65>
        <Pop_65plus>659325</Pop_65plus>
        <PercProp_0_14>21</PercProp_0_14>
        <PercProp_15_24>16</PercProp_15_24>
        <PercProp_25_44>29,8</PercProp_25_44>
        <PercProp_45_64>21,33</PercProp_45_64>
        <PercProp_65plus>11,77</PercProp_65plus>
        <Pop15_16plus>4376985</Pop15_16plus>
        <Married>2112496</Married>
        <Separated>236261</Separated>
        <Single>1740878</Single>
        <PercProp_Married>48,26</PercProp_Married>
        <Perc_Prop_Separated>5,4</Perc_Prop_Separated>
        <Perc_Prop_Single>39,77</Perc_Prop_Single>
        <Pop_Catholic>4200017</Pop_Catholic>
        <Perc_Prop_Catholic>74,97</Perc_Prop_Catholic>
        <Pop_NonCatholic>1139234</Pop_NonCatholic>
        <Perc_Prop_NonCatholic>20,33</Perc_Prop_NonCatholic>
        <Pop_NoneNotStated>263274</Pop_NoneNotStated>
        <Perc_Prop_NoneNotStated>4,7</Perc_Prop_NoneNotStated>
        <TotalHHlds>1914683</TotalHHlds>
        <OnePersHhlds>449146</OnePersHhlds>
        <PP_OnePersHhlds>23,46</PP_OnePersHhlds>
        <MarriedCoupleHholds_NoChildren>327306</MarriedCoupleHholds_NoChildren>
        <PP_MarriedCoupleHholds_NoChild>17,09</PP_MarriedCoupleHholds_NoChild>
        <MarriedCoupleHholds_Children>614501</MarriedCoupleHholds_Children>
        <PP_MarriedCoupleHholds_Childre>32,09</PP_MarriedCoupleHholds_Childre>
        <CohabitingcoupleHholds_NoChild>56057</CohabitingcoupleHholds_NoChild>
        <PP_CohabitingcoupleHholds_NoCh>2,93</PP_CohabitingcoupleHholds_NoCh>
        <CohabitingCouple_Children>37087</CohabitingCouple_Children>
        <PP_CohabitingCouple_Children>1,94</PP_CohabitingCouple_Children>
        <LoneParentHholds_Children>181832</LoneParentHholds_Children>
        <PP_LoneParentHholds_Children>9,5</PP_LoneParentHholds_Children>
        <AllHholds>1847081</AllHholds>
        <Households_OO_NoMortgage>645256</Households_OO_NoMortgage>
        <Households_OO_Mortgage>781679</Households_OO_Mortgage>
        <Households_OO>1426935</Households_OO>
        <HouseholdsRented_LA_NIHE_HCOP>221116</HouseholdsRented_LA_NIHE_HCOP>
        <HouseholdsRented_Private>199030</HouseholdsRented_Private>
        <Perc_Hholds_OO>77,25</Perc_Hholds_OO>
        <Perc_Hholds_Rented_LA>11,97</Perc_Hholds_Rented_LA>
        <Perc_Hholds_Rented_P>10,78</Perc_Hholds_Rented_P>
        <TotalHholds>1914732</TotalHholds>
        <PrivateHhold_House_orBungalow>1717159</PrivateHhold_House_orBungalow>
        <Private_Hhold_Flat_Apartment_M>160793</Private_Hhold_Flat_Apartment_M>
        <PrivateHhold_Mobile_TemporaryS>10096</PrivateHhold_Mobile_TemporaryS>
        <PP_PrivateHhold_House_orBungal>89,68</PP_PrivateHhold_House_orBungal>
        <PP_Private_Hhold_Flat_Apartmen>8,4</PP_Private_Hhold_Flat_Apartmen>
        <PP_PrivateHhold_Mobile_Tempora>0,53</PP_PrivateHhold_Mobile_Tempora>
        <Pop_15plus_16plus>3809537</Pop_15plus_16plus>
        <SecondLeveletc>1794823</SecondLeveletc>
        <ThirdLeveletc>834348</ThirdLeveletc>
        <Perc_Second>47,11</Perc_Second>
        <Perc_Third>21,9</Perc_Third>
        <Total15plus_16plus>4276854</Total15plus_16plus>
        <Employed>2303591</Employed>
        <PercProp_Employed>53,86</PercProp_Employed>
        <Unemployed>208444</Unemployed>
        <PercProp_Unemployed>4,87</PercProp_Unemployed>
        <Student>446429</Student>
        <PercProp_Student>10,44</PercProp_Student>
        <Retired>463568</Retired>
        <PercProp_Retired>10,84</PercProp_Retired>
        <LookingafterHome>527193</LookingafterHome>
        <PercProp_Lookingafterhome>12,33</PercProp_Lookingafterhome>
        <Unable_work_disabled>241042</Unable_work_disabled>
        <PercProp_Unable_work_disabled>5,64</PercProp_Unable_work_disabled>
        <AtWork15plus_16plus>2328215</AtWork15plus_16plus>
        <Agriculture_Hunting_Forestry_F>118015</Agriculture_Hunting_Forestry_F>
        <PercProp_AHFF>5,07</PercProp_AHFF>
        <Building_Construction>211022</Building_Construction>
        <PercProp_Building_Construction>9,06</PercProp_Building_Construction>
        <ManufacturingIndustries>366911</ManufacturingIndustries>
        <PercProp_ManufacturingIndustri>15,76</PercProp_ManufacturingIndustri>
        <Commerce>630061</Commerce>
        <PercProp_Commerce>27,06</PercProp_Commerce>
        <Transport>134061</Transport>
        <PercProp_Transport>5,76</PercProp_Transport>
        <PublicAdministration>158771</PublicAdministration>
        <PercProp_PublicAdministration>6,82</PercProp_PublicAdministration>
        <ProfessionalServices>400813</ProfessionalServices>
        <PercProp_ProfessionalServices>17,22</PercProp_ProfessionalServices>
        <Other>308561</Other>
        <PercProp_Other>13,25 </PercProp_Other>
    </aCounty>
 </counties>

et le javascript qui bug

<script type="text/javascript">
		<![CDATA[

			// load xml file
			function loadXMLFile()
			{
			
				if (window.ActiveXObject)
				{
					xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
					xmlDoc.onreadystatechange = function () {
						if (xmlDoc.readyState == 4) createTable()
					};
				}
				else if (document.implementation && document.implementation.createDocument)
				{
					xmlDoc = document.implementation.createDocument("", "", null);
					xmlDoc.onload = createTable;
				}
				else
				{
					alert('Your browser can\'t handle this script');
					return;
				}
				xmlDoc.load("../data/county.xml");
			}
			
			function createTable()
			{
				
				var x = xmlDoc.getElementsByTagName('aCounty');
				
				alert(x.length); // display 1 =OK 
				alert(x[0].childNodes.length); // display 189 = NOT OK
				alert(x[0].childNodes); // display object node list --> je pense que c est correct
				alert(x[0].childNodes[0]); // display object text --> cela doit correspondre a <aCounty>
				alert(x[0].childNodes[0].nodeValue); // display nothing (viewbox with nothing inside)
				alert(x[0].childNodes[0].nodeValue.length); // display 9 = ?
				alert(x[0].childNodes[0].length); // display 9 = ?
				
									
			}


			// display information about county
			var count = 0;
			function displayInformation(evt){
				loadXMLFile();
				svgDocument = evt.target.ownerDocument;
            			            var text = svgDocument.getElementById("percent").firstChild;
            			            text.data = ++count;			
			}

		// ]]>
	</script>

le probleme viendrait de la navigation (bon j ai un probleme avec ie aussi mais tant pis je verrais cela plus tard)
j ai mis des alert un peu partout pour comprendre mais les resultats qu il me sort ne correspondent vraiment a rien du tout.
si quelqu un pouvait m aider je bosse dessus depuis hier et je bloque totalement
merci d avance :hello: